Its a tough scenario because he's been booked like Shao Kahn in Mortal Kombat II. Him getting legitimate fight wins outside of WWE which they'll use to further market him doesn't help if you're trying to book him to lose. Dude just gets up from multiple finishers and weapons and proceeds to do a couple suplexes topped off with an F5.
Reigns is the only guy built as strongly as Cena to be able to withstand Brock's offense and he killed him twice. It'd take numerous interference to defeat current Brock like when Yokozuna beat Taker at RR 94.
He's killed Cena, Taker... took out all the heels on Raw with suplexes.. killed Kane and the Authority.. killed Ambrose.. killed Reigns... scared Bray Wyatt.... and eventually he's gonna kill The Club and Orton as well
I believe that they should allow Orton to use the punt kick tho at SS for added measure because we all know the outcome