Rey Mysterio's suspension is now over and he has been pushing for a match against Sin Cara at SummerSlam.
One WWE source told me the company is in no hurry to rush Rey back and aren't really interested in a Cara/Mysterio program right now.
I'm told the company wants to see how Sin Cara fairs on this go around and Vince McMahon figures he can bring Mysterio back at any point. The feeling is Mysterio's value to WWE will be hard to assess until they decide whether or not Cara is going to have legs.
The reason Sin Cara has received so many changes in the first place is because he is Triple H's pet project and with him just returning, it's believed the company wants to give a chance before bringing Rey back.