How far are we from End of Z?

Im very much looking forward to seeing Uub get some TLC, so I'm curious how far along we are in the timeline. I've got no doubt the story will run past the final episode of Z, clearly they're setting up Pan to play any important role at some point.. my only question is how long until that point?

With Trunks and Goten beginning to hit their growth-spurts I can't imagine we're too far off. But im assuming yall know better