Hm, it follows Revival of F. I suppose it will be it's sequel.
So, Toriyama will continue with
- this new Super Saiyan thing. In the film, both Vegeta and Goku achive Super Saiyan God Super Saiyan form, so I suppose we will have Super Saiyan God Super Saiyan 2 and Super Saiyan God Super Saiyan 3.
- by the end of DBZ, Z fighters outside of Saiyans (and Piccolo) were literally written off, it's very likely that in the folowing series Half Saiyans (and Piccolo) will be written off.
I didn't like idea of new Super Saiyans forms even in the film, but films feels nolstagic, I think he overdoit this time. I don't see this as being any better than GT. -.-
They should focus on a plot-driven Future Trunks spin-off.
I agree 100%. A lot of characters in the series didn't got backstory.
It would be hell out of story if Toriyama focused on giving Android 18, Android 17, Ginyu Force, Frieza's elites, Future Trunks' backstories.