Will Smith is one of the most popular actors today. And the movie that pretty much started off his mammoth career was Independence Day. Jeff Goldblum, and Bill Pullman are back, but why isn't Will Smith. Well the answer is kind of complicated.
Okay, so how it goes, is that Will Smith was originally very excited to return to role as Steven Hiller in Independence Day 2. And even Vivica A. Fox even said that she would return to the role as stripper Jasmine.
So why isn't Smith coming back. Well, as they put it, After Earth happened. And Will Smith wasn't very excited playing sci-fi roles, where there was a strong father-son aspect to the story. So don't expect to be seeing Smith in Independence Day: Resurgence. And as Emmerich put it:
"In the very beginning, I wanted to work with him and he was excited to be in it but then after a while he was tired of sequels, and he did another science fiction film, which was his father-son story, so he opted out."
And there are many people who could play Hiller. I guess we will have to see.