Top 5 WWE matches that could have happened but didn't 4

#4 Sin Cara Vs Rey Mysterio

Rey Mysterio’s last run was not at all spectacular. But in the midst of it he did team up with Sin Cara which clearly raised hopes that they might split and face each other sometime soon. But that day never came. The original Sin Cara has been released from the WWE, while Rey Mysterio and WWE are still dealing with the issues surrounding his contract. This match could have happened, would have worked but it never really took off.
And now, the chances of it happening seem to be long gone