That's the extraordinary position in which Essendon find themselves on Saturday night going into the opening of the 2017 season against Hawthorn at the MCG.

It's a big occasion for the Bombers, the impossible weight of the supplements scandal finally lifted after four hellish years. But a lot has changed even in the 18-odd months since the 10 players remaining at the club who were suspended by the Court of Arbitration for Sport last took the field for premiership points.

The group includes veteran Jobe Watson who, in his last game for Essendon, was captain and a Brownlow medallist, and now in his next is neither, with his successor as skipper another of that group, Dyson Heppell.

There's ruckman Tom Bellchambers who, in his absence, has been superseded as the No.1 man by former Brisbane Lion Matthew Leuenberger. And All-Australian defender Cale Hooker, whose temporary pinch-hitting as a forward in his last outings seems to have become a permanent shift.

And there's no fewer than seven midfielders, nearly all a regular part of Essendon's best 22 in 2015, but who return to find far more competition for a spot in the mix.

As the Bombers not only covered the gaping holes left by the CAS suspensions last year but looked to rebuild for the future under John Worsfold, the wheels of change kept spinning.

Zach Merrett, in 2015 still only a promising youngster, became in 2016 an elite midfielder, a best-and-fairest winner, and in 2017 is also a vice-captain. Draftee Darcy Parish fitted immediately into the midfield mix, and is an integral part of the engine room.

Orazio Fantasia and Anthony McDonald-Tipungwuti emerged as excitement machines up forward, an area in which Essendon have long struggled. And two more supposed "top-ups" - James Kelly and Matt Dea - acquitted themselves so well they remain part of the mix.

It's a world away from the Essendon of which the 10 returnees were last a part. Just how do they fit in to the new Bomber order? Let's take a look on a case-by-case basis.

TOM BELLCHAMBERS

Including last year's suspension, the big ruckman has played just 18 games in three years, also beset by ankle, foot and more recently a knee injury, from which he returned in a VFL practice game only last weekend. Definitely behind Leuenberger in the queue for No.1 ruck spot, though he, too, is injured. Coach John Worsfold isn't opposed to playing both now the Dons have some nippy little men up forward, but that's currently a moot point in a position where Essendon now look the thinnest.

TRAVIS COLYER

Was in career-best form midway through 2015 when a foot injury ended his season. Returns with perhaps even more responsibility. "Trav has had a crack in at the centre bounces on a few occasions in the pre-season and it's worked pretty well for us," says Essendon football manager Rob Kerr. Colyer will spend time on a wing and could also have spells up forward. He and small forwards Josh Green and Fantasia are likely to take turns to act as centre-square "shock troopers" when more pace out of the middle is required.

DYSON HEPPELL

The new Bomber skipper might have less change to his role than any of the other returning players. Heppell, who led the Dons for clearances and contested ball in 2015, is still No.1 midfielder, though with the on-ball division now batting a lot deeper, Worsfold might have more flexibility with his captain than previous coach James Hird did. "He might get asked to play at half-back at different times and could find himself on a wing," says Kerr. "We've got a few players in that category, and he's one."

HEATH HOCKING

The strongly built midfielder has played just five games since the end of 2014 after his 2015 season was ruined by a serious groin injury requiring surgery. In a deeper midfield, he's no longer a walk-up start, but his capacity to run with opposition key on-ballers will earn him selection more often than not. "It's a pretty good string to his bow that not everyone else has," says Kerr.

CALE HOOKER

The former All-Australian defender was switched forward in the second half of 2015, averaging two goals a game. And with Joe Daniher still needing support up forward, it's there Hooker will stay. "One will play higher pushing up the ground and one deep, so it will be fairly dynamic," says Kerr. The Hooker-Daniher combination will involve some "learning as we go", he says. "We haven't seen a lot of these two together, and 'Joey' has had another good season under his belt since Cale played up forward."

BEN HOWLETT

Of the 10 returning suspended players, it's Howlett who might have to fight hardest to win a spot in the best 22. Once an automatic midfield pick because of his work ethic, Howlett, a good tackler, has more recently been used as a defensive forward. His problem is that with the emergence of Fantasia and McDonald-Tipungwuti, and recruitment of Green, the Dons have an army of small forwards. That might see Howlett squeezed out of not just one, but two parts of the preferred line-up.

MICHAEL HURLEY

The All-Australian centre half-back of 2015 was arguably the player Essendon was most anxious about re-committing to the club. Will be the undisputed general of the Bomber defence with Hooker playing forward, and fellow keys Michael Hartley, Patrick Ambrose and Mitch Brown very much support staff. Kerr says the Bombers will be looking for Hurley to provide effective rebound as well. "He's a good kick, so we want him to do that as well as be someone who can quell a good opponent," he says.

DAVID MYERS

None of the banned 10 have played as little as Myers. Injured in the opening minutes of the first game of 2015, he was injured again in his only other appearance, giving him effectively one half of football since the 2014 elimination final. A finger injury means he'll miss at least the first month of this season, too. That said, fully fit, Myers is a walk-up start. "He's an inside mid with a long, penetrating kick. He's probably the one we'd be looking for to launch the ball into our forward 50," says Kerr.

BRENT STANTON

After weighing up retirement, the 30-year-old was given a one-year deal by the Dons. Not everyone thinks he'll be a regular with newer faces rotating through midfield. But the other side of the argument is that, relieved of the pressure of a weekly tag, with which he has sometimes struggled, Stanton can provide Essendon with his trademark endurance running from the luxury of a wing, or rebound off half-back, where he spent most of the pre-season.

JOBE WATSON

Now 32, the former skipper can't be relied upon to carry the midfield. The good news is Essendon probably won't need him to, thanks to the emergence of Zach Merrett and Parish. That means Watson looks set to spend more time than ever before up forward. "He can certainly take a grab and he's got reasonable forward craft in terms of his leading," says Kerr. Watson has only once kicked more than 16 goals in a season. That may change substantially in 2017.