I think they will introduce 6, 7, and 8 star mods. They are adding an 8th star to every character. The level cap will increase to 100. The other three gear 12 slots will open bringing in Gear 13. They will add a new arena for "Ground vehicles". At first, there will only be 15 or so vehicles including the AT-ST, Farmboy's Speeder, and Rey's Speeder. Finishing first in this arena awards one Lambda Ability Materials. Upgrading abilities to Lambda status will require 100 Lambda, 50 Zeta, 40 Omegas, and 200 Purple.
BTW, ship hardware isn't coming yet cause that would just be too much to throw into this update.