So, after following Mistico (now Sin Cara in WWE) for a while in CMLL and listening to his recent press conference, I must say that if WWE wants to and should do, a Cara/Mysterio feud can do wonders not only for both men but the company.
First of all, both man should have zero interaction with each other and I am talking about matches, segments, interviews, etc. Have Cara debut on RAW and make a name for him self as the future Luchador star. I'm not saying to put him in main event match but have him be putting on good matches and selling himself as the next Mysterio but indirectly.
A year later (two would make it better but WWE like to move fast, right?), have Mysterio and Cara have a segment at the Rumble setting off a potential match with each other at Mania. Have them in a feud where both men are the faces but the build would be a "who can top who" kind of thing (Does Mysterio still got it to keep up with Cara? Can Cara win the big one on the big stage?)
It's Mania time and both men put on possibly the MOTN and a MOTY contender and either man can win the match. If Cara wins, it puts him over as an established future star and Mysterio passes the torch to him and possibly retire. If Mysterio wins, it shows he still has it and makes him a veteran establishing a future star to take his place.
Farfetched? Perhaps but I was stoked when Ultimo Dragon debuted in WWE in 2002 and a Dragon/Mysterio feud in a big setting like WWE would have done wonders for both men. I followed Dragon since WCW and I felt WWE dropped the ball on Ultimo. With Cara, they can do this right and establish a future star.
Call me insane but I'm sold on Sin Cara and his future for now.