So besides putting on about 10-15lbs of muscle what else would say an Ambrose need to be credible for you. What wins would he need?In my opinion:
Winning a lot, not losing to lame wrestlers, getting WWEWHC championships, etc.
But they also have to have a legit look, worthy of a powerful and dominant wrestler. If he looks like an idiot no matter how many accolades he gets, he will never be credible.
Reigns, Lesnar, Cena are the most credible wrestlers to me right now.