There are four possible interference at WWE's Over The Limit 1) Lord Tensai & Sakamoto—Before Cena makes short work of Johnny Ace, Lord Tensai comes to the ring. This provides a distraction for both the referee and Cena, allowing Sakamoto to sneak up behind Cena, take him out one way or another (green mist, low blow, steel chair) and sneak out again before the referee is any wiser. Since Sakamoto isn't under contract, he can't be fired.
2) The Big Show—Maybe The Big Show's firing was all a part of the dual-show GM's master plan. Maybe The Big Show has been in his back pocket all along. Of course, if we take a look at the chronology, The Big Show was fired before this stipulation preventing interference from an active wrestler was announced.
But we all know that wouldn't stop the WWE from going with such an angle if they really wanted to use it. 3) Brock Lesnar—Since Lesnar has already "quit" and has yet to pay Cena back for his loss at Extreme Rules, Lesnar has nothing to lose. Plus, we can't keep him off of TV until his feud with Triple H comes to full fruition.
4) Someone completely new—Johnny Ace has been given credit for bringing several fresh faces to WWE since he took over, so maybe this is his way of introducing yet another new face(like Batista as you mentioned). This guy makes his WWE debut by laying out Cena and aligning with the hated executive. You can't be fired if you haven't yet been hired.
Instant heat. So most likely I think Big show would interfere.
In my opinion, I have to say that Brock Lensar and Big Show are the top 2 who will likely interfere with the John Cena vs John Laurinaitis's match at Over The Limit. Why these two? Like what you said.
Big Show would interfere just to get his job back from John Laurinaitis after being "fired" by Johnny Ace. Also there are too much faces in the WWE right now and Big Show is very stale as a face so a heel turn will definitively make Big Show interesting. About Brock Lensar, I can him interfering as his issue with John Cena has not ended at Extreme Rules and also he was back due to John Laurinaitis so it might be logical if John Laurinaitis texted Brock Lensar to help him out to allow Brock get his job back as a WWE Superstar.
Now before I ends, both Brock Lesnar and Big Show are currently "not" WWE Superstars so if they interferes, they won't get fired.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.