Which "Big Name" Actor will join the Disney/Marvel Family??

Looks like Keanu Reaves?

Probably Kevin Spacey.

I'll focus on characters who are actually Avengers in the comic books, although, KF could add any Marvel character he likes to the MCU roster of the Avengers.

Not all of these actors are "big name" quite yet, but are at least are on the edge...

Joe Manganiello or John Krasinski as Hercules (Harry Cleese)
---Obviously, Joe appears to be set to play Deathstroke over in the DCEU, but with everything on hold regarding that at the moment, perhaps he could be convinced to play the role he's far more suited for. If Joe isn't interested or cannot do it because of contractual reasons, then John Krasinski would be a nice fall-back option. I know, I know, but he could hit the weight room really hard. *If Henry Cavill wasn't already well known as Superman, he would be a good choice too.

Nathan Fillion as Wonder Man (Simon Williams)
---He might be a little too long in the tooth at this point, but he was made for this role. For those who don't know, WM had a romantic fling with Ms. Marvel (aka Captain Marvel) back in the day, so it could be a nice fit in adding him to the Avengers roster at this point.

Alden Ehrenreich as Sub-Mariner (Namor McKenzie)
---Although I'd rather see Alden take a crack at the next iteration of Wolverine instead, I think he could pull off the role as Namor. Now that Disney owns his rights, it would be a good way to bring him into the next phase, if they decide to wait on introducing the Fantastic Four.

??? as Nova (Richard Rider)

An interesting out-of-the-box character might be...

Taron Egerton as Union Jack (Joseph Chapman)
---UJ is not an Avenger in the comics, but he did fight alongside Captain America in modern times; he could work as an interesting foil to Winter Soldier and the new Captain America (Sam Wilson) ...more international flair is always a good thing

Marvel knows by now that they don't need big names to sell billions of tickets, so they aren't going to be hiring big actors who cost money for the sake of ticket sales. They'll hire the best actor for the role, be the name big or small, because one of the secrets of their success is doing a superb job with the casting.

For the last few years top actors have been so eager to get on the Marvel bandwagon that they've got big names taking small roles, just to be part of the fun.

Johnny Deppers
Channing Tatum
Mel Gibson

Not gonna happen since he’s part of the DC debacle but...

Henry Cavill with that beard and a narcissistic demeanor would make a great Hercules if they chose to drag Olympus into the universe.

I remember the laughable rivalry in the comics between him and Thor. As well as the Saturday morning cartoon when Thor had to save his ass.

Just sayin’...

♞🖤👹🖤♞

I'd like to see Betty White before she's gone. Bob Newhart, too, although they'd have to find the right parts.

I think Bill Murray would be great in a villainous role.

On the younger side of things, I'd like to see Daisy Ridley in something. Not so young, but John Hamm really should have a place in the MCU.