I don't think a new TNG movie will ever happen.
But, a mini-series of the 24th century would be great.
Shot in Hi-Def/widescreen featuring regulars and recurring characters from the 24th century would be the way to go.
No moaning about getting the 'complete' cast of any particular series or following in the exact footsteps of where anything left off.
you'd get the actors who really WANTED to return--rather than having to bribe a few 'major' actors with huge salaries.
Forget the Borg, the Cardassians, the Klingons etc as adversaries and come up with a new threat/mission or whatever for the heroes to face.
Even a 'Magnificent 7' type story would great with Garak, Riker, Worf, Tuvok, Troi, Seven, Martok, Kurn, Geordi, Paris, Bashir & O'brien & many others to chose from--perhaps with the Titan as the amin vessel.