At this stage, we're probably better off talking about who's NOT in Captain America: Civil War.
The latest Marvel instalment, which is set pretty much right after Age of Ultron, will centre on a dispute between Captain America / Chris Evans and Iron Man / Tony Stark / Robert Downey Jr. over... well, we don't wanna spoil it. Needless to say, stuff goes down and nothing's the same afterwards.
As we've been following the production, the cast list has grown and grown - Chris Evans, Robert Downey Jr., Scarlett Johansson, Daniel Bruhl, Martin Freeman, your Da probably, Elisabeth Olsen, Jeremy Renner and many more.
Now, we can add another actor to the already impressive list - Mark Ruffalo, better known in the series as The Hulk.
There's been a number of denials and "No, he's definitely not in it, we think", but now it looks like Ruffalo's more or less confirmed it himself.
In a recent interview, Ruffalo said that he's been told by Robert Downey Jr. that's he in Civil War, "which I'll take as biblical, but I just haven't heard or seen from production yet."
Likewise, Ruffalo tweeted out an image of the logo from Civil War, not to mention happily chatting about the film during interviews for other films.
So, thoughts? At this stage, we may as well call Captain America the next Avengers movie, such is the cast list. We're guessing not all of these are going to be in it for any more than an extended cameo, but it does raise an interesting question.
At what point will these cameos become distracting? It's going to be like Cameo Bingo watching Civil War, especially considering that these standalone films are a nice bit of breathing space for the central character.
Piling in the likes of Ruffalo, Jeremy Renner and Liz Olsen's going to detract from all that, we think.
How about you? What do you think? Let us know in the comments!