Apparently, Florence has talked about [Stars on the Ground] with Hank way before she did with Aiden.
He was also interested in the project, having heard the basic premise of it.
Both of them were on board after a few meetings and Hank was really excited as it was his chance to move away from the image of an action star. The role he was given was pretty comedic, so it was a great chance for him to flex his comic timing.
But one day suddenly, Florence called his agent and told him that she had found someone better for the role.
Hank was surprised and enraged, wanting answers. According to him, the role was his and only the contract needed to be signed.
If a director goes as far as to tell you that she can't imagine someone else in the role other than you, then it was a big confidence boost for the actor.
So, when Florence suddenly found someone else, it felt like a big betrayal to him.