So, in terms of Marvel stuff...
Thor will keep going. Obviously they aren't going to keep him as Fat Thor... that was a one time thing (which I f'ing LOVED... first, bc it was a great "F you" to the women who love to swoon over him, and second because it was funny, and finally because it helped with the bigger story for him, a serious one in which he is dealing with the death of his mother, father, brother, people... it helped bring a seriousness to Thor). And they aren't looking to get RID of Chris and replace him with Nat Portman... Hemsworth has said he wants to keep at it. My guess is Portman does this movie and that's it, but Hemsworth will be around.
There are plenty of charismatic folks in Marvel, although I also will REALLY miss Robert Downey Jr. and Chris Evans, and losing Boseman is such a kick in the dick. Tom Holland is great, the whole Guardians group is great, Tom Hiddleston and Chris Hemsworth are great, Jeremy Renner is still doing stuff, Falcon and the Winter Soldier are coming, Paul Rudd is funny as hell, Don Cheadle is great, Ryan Reynolds is awesome, Kat Dennings boobs are great...
And this upcoming phase of Marvel characters might not be the most famous ones...
.... but the X-Men are out there, somewhere. And that should be f'ing EPIC.
I feel like Marvel has really done an amazing job with this whole set of movies... it's maybe the most impressive overall work in film history, as crazy as that might sound, given the size and scale and scope and consistent quality... and I'll give them the benefit of the doubt, as much as it sucks to see guys like Evans, Downey, and now Boseman go