I'm hearing a lot of rumors lately around Facebook and other forums that there is a db/DBZ continuation or reboot in the mix. Now this is purely based on rumor, so that's why I'm asking. Has anyone else heard this? Fact, or fiction?

I, for one, would love a continuation canon wise that erases dbgt. Gt was just stupid.

I would much prefer a spiritual successor.

If this is true it better not be another GT...

Are there even any manga chapters left to be adapted to anime?

Well, there was already a total reboot of DBZ, it's called Dragon Ball Z Kai. If this is something different, it's either a reboot of Dragon Ball, or an actual successor.