Avengers: Age of Ultron introduced three new heroes, Scarlet Witch, Vision, and Quicksilver, who ended up perishing in the final act of the film. Since his death there hasn’t been a lot of reference to him or even emotional suggestion from Wanda toward her dead brother in the later films but with Avengers 4 supposedly being the end of this current era of Marvel movies all things are possible. Such as a surprise return from everyone’s favorite speedster, Quicksilver.
There have been several rumors that Aaron Taylor-Johnson has been sighted on the Avengers 4 set but that might not mean anything. Yondu actor Michael Rooker was caught on the set of Avengers: Infinity War which gave fans reason to believe he would be part of the superhero ensemble. That’s why everyone was so shocked when he ended u dying in Guardians of the Galaxy Vol. 2.
But here’s the question; it’s not so much will Quicksilver return in Avengers 4 rather than should he return? Honestly, I think it would be nice to see him again.
He brought such an awesome dynamic to the Avengers team and when he died it was rather unfortunate. But I’m pretty sure that if he does return it’ll either be in a flashback or a part of the rumored time-travel theory that’s supposed to take place in Avengers 4. Will he be brought back from the dead like the other deceased heroes? Not likely and for one simple reason.