I can confirm that Rey Mysterio'sWWE contract is up in a few months. However, I'm told the company is actively trying to re-sign him and the general belief is that he will re-sign.
Mysterio is in no rush to re-sign because he knows the more interest he can garner from outside suitors, the more leverage that he'll have with WWE. I'm told he has no interest in TNA Wrestling but both AAA and CMLL in Mexico want him and think he's leaving WWE. However, I'm told as long as he can get another contract at his current downside, which is very high, he doesn't want to give up that kind of guaranteed money when he knows his body might fail him at any time.
This is a situation similar to what happened with Mark Henry last summer. He ended up with a good deal after posturing like he was leaving. Mysterio is hoping for the same.