Just posted on Marvel.com: Piecing Together Marvel Puzzle Quest: Hulk
As a quick overview, he’s a 4-star that has a green passive along with an active purple and yellow. His green passive is a big board shake at the start of the match with a passive tile swap at the beginning of every turn. His 14 purple AP power will create critical tiles and deal damage while his 12 yellow AP power creates fortified countdown tiles that do a variety of different things if they exist at the beginning of every turn.
Hulk will be a placement reward in the Hearts of Darkness event that begins tomorrow and will be an essential and progression reward in Webbed Wonder immediately afterwards. Read up on him for further information!