Varför har Hugo Weaving inte repeterat sin roll som Red Skull?

Kanske för att han inte var intresserad av att göra det. Han var ganska tydlig om hans åsikt för framtida skildring av karaktären från början, från hans 2012-intervju från collider (betona min):

I [signed a multi-picture deal] for Captain America. I think the tendency, with those films, would be to probably not bring a villain back. They might for The Avengers, but I didn’t think I’d be in Captain America 2 or 3. I don’t think Red Skull will be there. And it’s not something I would want to do again. I’m glad I did it. I did sign up for a number of pictures and I suppose, contractually, I would be obliged to, if they forced me to, but they wouldn’t want to force someone to do it, if they didn’t want to. I think I’ve done my dash with that sort of film. It was good to do it and try it out, but to be honest, it’s not the sort of film I seek out and really am excited by. As an actor, to do all sorts of different films is great. It stretches you in different ways. But, I increasingly like to go back to what I used to always do, which is to get involved with projects that I really have a personal affiliation with.

Men inga officiella ord kom för Avengers: Infinity War specifikt ännu.

I en intervju med Uproxx frågades Russo Brothers om Hugo Weaving återvände inte och sa följande:

Did Hugo Weaving not want to do it?

Joe Russo: You know, he made a statement a couple of years back that he was done with Marvel.

Det verkar som om de var medvetna om Weavings tidigare uttalanden om den roll som hänvisas till i Ankit Sharmas svar, och bestämde sig för att respektera hans önskningar att inte göra det igen.