You would think so, but look at McCarthy, didn't get his way and is now on indefinite leave. Who knows what deal they will make at the end of the year. While Cam is nowhere near Hulk's in talent (IMO) the precedent has been set, if you don't get your way, throw a fit and ask for leave until you get your way.
I do not know Jesse personally, so i can not be certain if he will leave or not, or even if he is the type to screw us over like that.
Would be nice to know from people that grew up with Hulk if he always looked so grumpy LoL.