Suppose our beloved Avengers get their hands on the guantlet and try and undo the snap. The problem is who could do it? Thanos himself was injured from the power of the snap and not any normal being could wield all those stones.

So that leaves out Captain America, Ant-Man, Black Widow, Rocket, Iron Man, and so forth.

Some candidates include Nebula, Thor, Captain Marvel and Hulk. But I also think you have to have some brains to to actually use it as well. In theory I think Nebula isn't powerful enough and maybe even Thor couldn't handle it without risking his life. Maybe Captain Marvel but I don't like the new kids on the block saving the day.

My guess is the person that could do it Professor Hulk. Banner and Hulk finally come to terms and together they would have the brains and strength the use the guantlet.