As far as the story goes, I will believe it when I see it. I have heard too many things that have not come true from CC's camp to rely on this.
I do not know how I feel if it is true, because I think with the proper training CC can still be a force at HW in the UFC IF AND ONLY IF he is studying the game and evolving. I don't have a ton of faith Cro Cop is up to that kind of thing. Not training in a cage before his first tenure in the UFC showed what I believe to be a lack of understanding of the depth of strategy in MMA. He should have realized what the cage means to clinchwork and escaping the ground if nothing else and trained accordingly. If CC is gonna fight in the UFC, I'd like to see him train in a place that understands modern MMA strategy and conditioning. That place would most likely be in the US or Brazil, although there are some european and japanese camps that are finally starting to understand the concept of things like weight-cutting, scientific diets, modern conditioning techs., studying video and making an opponent-specific gameplan.
I guess I just don't see all that happening and as a result I don't see Cro Cop doing that well in the UFC again.
Then again, all CC needs is one clean LHK and he can put anyone in the world to sleep.