I got it!

After Saudi Arabia, Vince should get Roman a bus to go cross country campaigning for one more shot at SummerSlam. He wins there by countout and all the faces celebrate with him on their shoulders. Heyman says no more title shots so the Roman Express drives into the GREATEST ROYAL RUMBLE EVER, he wins from number 1 and they main event Mania 35 in MetLife! That is a guaranteed time tested way to get Roman over

In other words, Roman is Lex Luger 

Thanks for clarifying that one.