Sorry dude but in real life if Rey Rey came up against the like of Tista, Taker, Orton,HHH, Cena they would swat him like a fly. Even in kayfabe the 619 it's weak as fuck.
Yeah i give you that Rey has some flashy arse moves and some pretty good spots. But coming up against sum of the above mentioned guys Rey wouldn't stand a chance
Welcome to professional wrestling, where things aren't real life. Mysterio has already been in matches with Batista, Undertaker, and Orton where he looked like he could legitimately pull out a win. Besides, Rey is on Smackdown where his opponents are even more likely to be his size--Punk, Edge, and Jericho.