Why hasn't Brock Lesnar come back yet?

[Guest Gary Busey]

Regarding his private jet, from the court papers:

 

"In January 2004, Lesnar demanded that WWE pay him to buy a private plane to ease his travel to weekly WWE events. Despite the unprecedented nature of his request, WWE agreed and on or around February 9, 20044, WWE amended Lesnar's 2003 Contract to reimburse him for some of his private plane expenses."