Star Wars: The Last Jedi Trailer - 10 Things We Want To See
5. Snoke And Kylo Ren
At the end of The Force Awakens, Kylo Ren has been summoned to wherever it is Supreme Leader Snoke resides, in order to finish his training.
Ren is already a powerful Force-user, but should be even stronger with added training, even if it's unclear exactly who/what Snoke is and how much power he wields.
While there's a lot that can be saved for the film and even just later trailers with this, both should appear in this teaser. Snoke's voiceover worked well before, and he could be utilised in a similar way here, and could even appear proper - depending on what he actually looks like, and if that hologram was radically different to his real form.
A solution to that would be to hear him speaking, and quite clearly in a scene with Kylo Ren, who we could see training - another shot of his crossguard lightsaber feels like a must - and get to see his new mask/helmet. While he doesn't need one to protect his identity, it'd fit with the character that he'd continue to wear one, and it'd be cool to see just what it looks like in the trailer (especially as he'll feature prominently in merchandise, so it's not gonna be a surprise for the movie).