Brock Lesnar Returning to UFC? Leaving WWE After Elevating Roman Reigns or Ryback?

I think that WWE is in deep trouble in regards to their situation with Brock Lesnar. A lot of fans believe that the company shot themselves in the foot by having Lesnar break the Undertaker's legendary Wrestlemania streak as well as squashing John Cena to become WWE World Heavyweight Champion.

The amount of limited appearances for 2014 in Lesnar's contract seems to be used up by WWE. Thus, he probably won't be appearing at all for the rest of this year and return sometime in 2015. His contract is rumored to expire after Wrestlemania.

Lesnar has recently expressed interest in returning to the UFC (see article below). He might use this as leverage in negotiations with WWE to try and increase his pay and demands regarding his work schedule. WWE would surely have to pay millions more dollars to keep him around. It is rumored that because of this, WWE might have Lesnar lose the championship before Wrestlemania 31 in order to get the titles off of him and prepare for his potential departure.

http://bleacherreport.com/articles/2272308-dana-white-teases-second-ufc-run-for-brock-lesnaragain

I think that it would be stupid to waste more money just to keep Lesnar around longer. He's not doing much and should be used up once he puts over new stars like Roman Reigns or Ryback. After Lesnar elevates a new star, WWE should just be say good riddance and be done with Lesnar for a long while until the next time he returns with a reasonable contract.