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