Star Wars: The Force Awakens - 10 Things We Need To See In The Next Trailer
4. Dialogue
Aside from Han's homecoming, we haven't had any dialogue in the two teaser trailers (not including the voiceovers, of course). Anything that's obviously spoilery doesn't need to be included, but much of the dialogue they'd include would be out of context anyway.
Thanks to the toy releases you can hear lines from Kylo Ren and Finn, and since that's already been revealed it'd be good to hear exactly what they sound like on film. Similarly, what does Rey sound like, or Poe Dameron? Do all the characters have American accents?
It'd be good just to hear a little snippet from the characters, so we know what to expect come seeing it in the cinema, and just get a little bit more understanding of them. Hell, even just an excited 'Artoo!' from C-3PO would do at this stage. Just give us something, JJ.