The only bad things about Kane's return were his new attire (the flames on the leg, really?) and the fact that the crowd were a bit shit.
It was done well though, and that first mask/helmet thing he had on looked pretty badass.
Wasn't it Henry who put him out in the first place? I think he might go straight into the World Title picture, probably doing a "battle of the monsters" type thing with both Show and Henry.