#1 Rey Mysterio
On last week's episode of RAW, Seth Rollins brutally attacked Rey Mysterio and pushed him eye-first into the edge of the steel ring steps. Last night, the Monday Night Messiah said that what happened to him was a blessing in disguise and he will eventually come to understand that.
This could signal a monumental shift in Mysterio's character, as long as he re-signs with WWE. He could shockingly turn heel and align with Rollins, giving himself up to WWE's resident cult-leader. Rey Mysterio has never turned heel in the company, so this could be an intriguing prospect.
If this does happen, we may get to see what would have happened had Mysterio joined the Straight Edge Society ten years ago. His role as a disciple of Seth Rollins could just be a temporary thing, with a spectacular blowoff match in the waiting.
This could even be a way to bring Rey Mysterio's son, Dominick into the fold further down the line if he is ready. As Rollins guides Mysterio towards the light following his return from the eye injury, Dominick could show his father the true light and rescue him from the dastardly Monday Night Messiah.
A story like this would be perfect for Dominick to have his first match in WWE. There is a lot of storytelling potential in Rey Mysterio joining Seth Rollins and his disciples.