To keep the Brock train rolling, they should have him on Raw talking the talk until Randy Orton interrupts. Before the end of the scene, have Orton deliver an RKO and set Brock into another fury for the next few months until Survivor Series where Orton/Brock would take place.
The best use of Brock would be to let him go on a rampage now that he is away from Cena until Wrestlemania where Undertaker would take the win to end the return of Brock.
Rey and Sin Cara should team up to help the tag-team division. Ziggler shouldn't be thrust into the title picture just yet. I'd like to see him win it at the Royal Rumble to build up to Wrestlemania.
Eh.
Cena? HHH? Orton? Taker? Rock?
All the guys who DON'T gain anything from winning against Brock and don't lose anything by not winning against Brock.