User blog comment:DYBAD/Character Sheet/@comment-25417020-20141116202051/@comment-4867780-20141119030449

Confirming that Omnipotence is narrative favoritism pushed to its logical conclusion, rather than a credible in-universe ability. So placed on narratively neutral ground (the only valid one when it comes to vs matches), they would be downgraded to Nigh Omnipotence at best, possibly much less if the character's creator didn't bother to give him any background.

Omnipotence is impossible to prove, because simply too extreme. So it only exists through popular faith in iconic users.