People can say what they want about Brock, but he is not coming back for the money.. it seems pretty clear he has as much of that as he could possibly need in this lifetime, or ten more.. sure, he is getting paid... but it not like it is going to fundamentally change his life..
that being said, Mark Hunt could fundamentally change his life, if he lands one of his bombs... Brock is coming back to fight a very dangerous, active opponent.
Brock may be a sideshow, but I think it would be a mistake to question his motives, the guy is a competitor, and he wants to close out his career on his terms. I may not be a fan of some of his antics, but I am a fan of his spirit...