Several months ago, I noted that Rey Mysterio had the option to leave WWE if he chose to exercise the opt-out clause in his contract.
Mysterio did not exercise that option so his contract is now due to expire this fall, sometime around September. He signed a two-year deal in September 2018 with an opt-out option after the first 18 months. The reason why he chose to sign a short contract rather was because he wanted to keep his options open and he wanted to see how his body would hold up.
It is interesting to note that he has not agreed to terms on a new deal so, unless something gets signed in the next few months, he could be a free agent and he could sign with another company. WWE has already begun talks with him about signing a new contract.
Several months ago, some people in WWE felt that Mysterio would opt to stay with the company since there was talk of having his son Dominik start his wrestling career this year but that has yet to happen and there are no guarantees now that booking plans have changed since they’ve been forced to work with a skeleton roster at the Performance Center.
I wouldn’t rule out a jump to All Elite Wrestling for Mysterio since he is friends with several people who work there and he worked on the All In show in 2018, despite WWE’s attempts to get him to pull out of the show. If Mysterio signs another WWE contract, he will likely be locked in for 3-5 years as Vince McMahon is looking for long-term commitments to keep wrestlers away from AEW.