I just sure hope they don't stop at level 10, there is another quantum jump at level 11 it would feel like being stuck now at level 4 and yearning for that extra attack or fireball.
If they planned on 10 but are looking at more I would hope for at least 12. That would get you to the third ASI for a flavorful feat, but they wouldn't have to go into implementing level 7 spells or higher for now.
I am also hoping there will be DLC. I picture it like buying another core book from the tabletop game, buy Xanthar's get some new race/class choices and spells, etc...
