-Brock Lesnar, unlike the returning Hulk Hogan, is still resented for
leaving the WWE after Wrestlemania 20 in 2004. He rubbed a lot of
wrestlers the wrong way on his way out, given that Lesnar was
dissatisfied with his role in the WWE at the time (part of why he left
the WWE). The feeling is that when things became uncomfortable in the
WWE, he "took his ball and left", but now the WWE is willing to take
him back. This is after the fact, too, that Lesnar has filed a lawsuit
against the WWE and bashed the WWE during his brief NFL stint.
The early word is that Lesnar will be returning to Smackdown, the
brand he considered home for most of his WWE career.
Also, there's a feeling within a few involved with the WWE about Brock
Lesnar having already signing a WWE contract.