These Are The Days
Oh no! We suck again!!
Joe.
I don't accept any other answers, Joe is the one true pick.
Shame on me but I forgot he was an option. I like that a lot. Damn Kimi you need to be a booker.
With Brock as a tweener with no real allegiance one way or the other, lining up Joe to face him would work out really well. It would just be business as usual on Brock's end.
I don't know how important WWE would consider the fans reaction to the situation, but if they want to keep Joe's identity of a monster heel then perhaps Brock can put over Goldberg after Mania after winning the Universal Championship and show him a little bit of love. In the meantime WWE has Joe eating up the babyfaces and putting down the Goldberg feud as a cocky #1 contender. That way they can draw the battle lines and get the crowd fully behind Brock because we only see so much of him so often.
Looking ahead, Brock being in the Summer Slam title match feels almost inevitable. Should that be the case then Seth Rollins is gonna have to wait a LONG time to climb that mountain again. Not to mention Owens winning the title back again.