The confirmed cast so far. Check out this line up!
Chris Hemsworth - Thor
Natalie Portman - Jane Foster
Christian Bale - Gorr the God Butcher
Tessa Thompson - Valkyrie
Taika Waititi - Korg
Jaimie Alexander - Sif
Chris Pratt - Star Lord
Vin Diesel - Groot
Bradley Cooper - Rocket
Pom Klementieff - Mantis
Matt Damon - ?
And i bet there's plenty more to come. I'll throw some other strong possibilites out there, Tom Hiddleston, Mark Ruffalo, Jeff Goldblum, Cate Blanchett, Idris Elba...
I'd even say there's a decent chance for Anthony Hopkins to show up again, even if it's just as a vision/ghost, like he did in Ragnarok.
We could get a version of this scene, where Odin welcomes Jane into Valhalla: