Change his tune? Why would he need to do that? WWE needs The Rock MUCH MORE than The Rock needs the WWE. He didn't need to come back at all.
No, it's not a bit much. A lot of people laugh at wrestling, so it's harder for a wrestler to make the transition into something else, like MMA or movies. He did what he had to do. He didn't want to be a wrestler anymore, he wanted to do movies. He didn't want to be known as "The Rock", he wanted to be a movie star, which he is. A mainstream movie star. He didn't have to assosciate himself with WWE, didn't owe them or tha fans a damn thing. Seriously, man up and get over it, or change the channel when he comes on.
It's a bit moronic to compare the acting careers of Hogan and The Rock, if that's what you are getting at. If that's not what that last comment was, not sure what you mean.