Re: Rey Mysterio heel turn a possibility against Sin Cara at WM29!
No thanks. Mysterio tried to turn heel way back in WCW. It failed terribly. We should learn from past mistakes, don't try it again. Another point is, if Mysterio turned heel, how could Sin Cara actually be fully defined as a face? He will not be able to cut promos due to his lack of english. That will make it harder for the crowd to be behind him.
I think it would be best to try a Face VS Face feud. Simply have the whole idea of who can be true wrestler/champion of Mexico and Luchádore style. This will put Sin Cara over rather well, as he really should win this match. The alternative is to make Sin Cara heel, which will be less reliant on promo work and Mysterio's promo work can put Sin Cara over more as a heel. Turn Sin Cara face after beating Mysterio at Mania.
Either way, Sin Cara has to be a face coming out of WrestleMania 29.