Well, I thought that if Hoenn has their own "Fan Thread", Sinnoh should at least get one because Unova is on its way to the States and the rest of the world. :]
Will Hoenn determine Sinnoh's fate?
I don't think so. Sinnoh, in my opinion, fixed alot of things that were wrong in Hoenn. Don't get me wrong, I love Hoenn for everything, and it is my favorite. Other than that, Sinnoh most likely won't be featured in the current generation. It is Unova and, almost inevitably, Hoenn's turn.
Sinnoh was a good solid region. I am definitely looking forward for the return to Sinnoh.