What's the next step? For them to pull HBK out of the closet, er... moth balls and have him try to get revenge on Brock on Survivor Series or something?
I think he needs to get a win over Cena because that's still a black cloud hanging over his head, IMO, if they are NOW going to have him run through whoever stands in his way. He's obviously going to be "stopped" at WM but he was stopped his first night in so they need to show even Cena can't slow him down right now. Maybe they'll call him out tonight.
Undertaker should be the one to stop him though. Rock/Brock shouldn't happen at all because that makes the entire active roster look bad if they go to WM with that and put Rock over.
I say Lesnar goes over HBK at Survivor Series, goes over Cena at the Rumble (or switch the Cena & HBK matches), loses to Undertaker at WM.
Tonight though... he needs to send another message. Time to feed Ryback to Brock.