[Abyss]

You've probably seen it by now but they added almost everyone who's played an XMen character, minus Reynolds and Jackman.
MacKellen, Stewart, Marsden, Romjin, Cmming, Channing... all there

ETA found it, courtesy of Dark Horizons, bad formatting mine....

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Here's the complete list:

AVENGERS

Chris Hemsworth's ThorAnthony Mackie's Sam Wilson/Captain AmericaLetitia Wright's Shuri/Black PantherPaul Rudd's Scott Lang/Ant-ManSimu Liu's Shang-ChiMCU CharactersWinston Duke's M'BakuTenoch Huerta's NamorDanny Ramirez's Joaquin Torres/FalconTom Hiddleston's LokiNon-MCU CharactersRobert Downey Jr.'s Doctor Doom

THUNDERBOLTS

Sebastian Stan's Bucky Barnes/Winter SoldierWyatt Russell's U.S. Agent/John WalkerFlorence Pugh's Yelena BelovaLewis Pullman's Bob/SentryDavid Harbour's Alexei Shostakov / Red GuardianHannah John-Kamen's Ava Starr/Ghost


FANTASTIC FOUR

Pedro Pascal's Reed Richards/Mr. FantasticVanessa Kirby's Invisible Woman/Sue StormEbon Moss-Bachrach's The Thing/Ben GrimmJoseph Quinn's Johnny Storm/Human Torch

X-MEN

Patrick Stewart's Charles XavierIan McKellen's MagnetoJames Marsden's CyclopsAlan Cumming's NightcrawlerRebecca Romijn's MystiqueKelsey Grammer's Dr. Hank McCoy/BeastChanning Tatum's Gambit