Does anyone think we will see Jedi returning from exile? Not necessarily any familiar faces, nor the actual act of showing up out of nowhere, but rather some sort of passing reference to the fact that some Jedi may have survived the purge and have returned to help Luke with his New Jedi Order.

I would love to have an older Jedi thrown in to fill the void of the wise old Jedi. It's actually a shame that Lucas had most of the familiar Jedi faces killed off in ROTS, because that would be one of the few connections to the PT that I wouldn't mind seeing. They would be able to convey an innate knowledge of the failures that took place in the past, and be helpful in maintaining a more steady order. You could argue that Luke will be the wise older Jedi, but I think his story will be slightly too prominent to carry the mystery and gravitas of, say, old Ben or Yoda.