Spoiler Thread: Avengers Infinity War

I dunno, I think the Hulk being in there is just to throw people off from what happens in the actual movie. It's interesting they'd do that.
Yes.

Remember, they did the same with Thor: Ragnarok. They didn't use any of his Lightning CGI in the trailers. They didn't want to give a plot point away.

Actually, I commend Marvel for doing that. We often complain that the Trailers give us too much. Nice of them to throw us off a little.