Thor: Ragnarok Begins a Three-Movie Arc for Hulk

Mark Ruffalo said big, new questions about the Hulk and his powers will be addressed in future films.
So says actor Mark Ruffalo.

Thor: Ragnarok Begins a Three-Movie Arc for Hulk - IGN

How come in Thor: Ragnarok Hulk got stuck as Hulk? Why didn't he get stuck as Professor Hulk? - Quora

Thor: Ragnarok (2017) - News - IMDb

What is Planet Hulk and how will it fit into Thor: Ragnarok?

Thor: Ragnarok [4K UHD] : Chris Hemsworth, Tom Hiddleston, Cate Blanchett, Idris Elba, Jeff Goldblum, Tessa Thompson, Karl Urban, Mark Ruffalo, Anthony Hopkins, Benedict Cumberbatch, Taika Waititi, Rachel House, Clancy Brown

The MCU's Incredible Character Arc for the Hulk (That We Never Got to See) – The Screamsheet

Thor: Ragnarok' Ending Explained By Screenwriter

Marvel's Funniest Movie Is Now on Netflix

How Avengers: Endgame failed the Incredible Hulk - Polygon