How The Avengers: Endgame Ending Changed The Comics
4. Bruce Banner IS Professor Hulk
One of the best surprises with Endgame was Bruce Banner's transformation into the Professor, the name used to describe the good doctor's transformation into a version of the Hulk that retains his own personality.
Many fans may suspect that the transformation may only be temporary, and while there's precedent in the comics to suggest that it will be, Banner ends the film with his new form intact. There's nothing to suggest he won't continue to be the 'professor' from now on, and while it's still unclear as to how great a part Mark Ruffalo's character will play going forward, one would imagine that this version of the character is here to stay.
Whether or not that is the case, Endgame ends with Bruce still in control of his faculties as the Hulk. The comics, however, are a lot more wobbly.
Bruce has been cured, transformed and fiddled with on countless occasions over the years, and after Peter David introduced the smarter Hulk in his own run, it wasn't long until things were back to normal, and Banner's other half was back to his old monstrous self.