User blog:CNBA3/Gray Spin Off series!

I have been thinking if Hiro Mashima (or another designer) is going make a spin off based on Gray, does that mean at some point on the future Gray will leave Fairy Tail?

I was thinking of this since Silver was introduced there have been theories that he maybe Future Gray or Gray's Father. I was thinking maybe something will happen in the Tartarus Arc that will cause Gray to leave Fairy Tail.

What are your thoughts.