Imho I agree not being able to finish your pizza is kinda weak, but the way you are bragging about polishing off two of them just makes you sound fat and unhealthy - not really something to brag about.
It's hard to tell in the new 52 since she has very few feats in her main book, she has however broken green light constructs, taken and given damaging hits to Zod/Faora, lifted a huge space ship (but she seemed to be struggling?), that's about it strength wise. Durability wise she survived a nuclear explosion, she took a punch from Doomsday that broke her arm. No speed feats that I remember.
To many rumors in one place, there's no way they would do more then 1 or possibly 2 guest characters at the most, and it's way to early too. Almost surely fake rumors. Oh and the characters are a bit off too, not enough people know about Frank or Spawn, Ash is to human, Pinhead is too godly (he wouldnt even really have a walking animation), Predator I could see kinda fit, but I don't see it happening.