Source: The Wrestling Observer Newsletter
Word is that the WWE is already planning for this year's SummerSlam event. The show is scheduled to take place in Los Angeles again and WWE is looking to possible book a Brock Lesnar vs. The Rock match for the show.
The reason being that both have mainstream appeal and that with them in a featured spot, the local Hollywood community could get more involved with the event. An example would be having celebrities appearing at the WWE AXXESS event.