The hilariously drama queen thing about the title and Luke Skywalker's pronouncement at the end of the new teaser is that we (i.e. everyone on the planet with any sense) know there will never be a "last" Jedi. Not with literally billions to be made every single year from milking this franchise until no one cares anymore ... an event that surely won't occur in our lifetimes.
Exhausting as it can be sometimes to live inside a film culture that wants the exact same things annually: two Marvels, two DCs scattered from spring to Fall, a Star Wars movie each Christmas, at least 15 concurrent bi-annual franchises and a few ever-discussed franchises that are infrequent (James Bond for one), Disney has done a bang-up job stoking the fire for annual Star Wars adventures, a fire that would burn bright without any stoking whatsoever!
But they stoke well you must admit. Here is the excellent teaser for The Last Jedi, which is mostly focused on Luke and Rey with a few key shots reminding us of the other players.