Wizkids have announced their 13th Icons of the Realms set "Volo's & Mordenkainen's Foes" for december 2019.
It is still priced at $15.99 per booster.
Pathfinder Battles set 17 "Legendary Adventures" is priced $17.99.
That seems to be the new price for PFB boosters going forward.
There is no word yet on "Starfinder Battles" pricing, but i expect the first set in early 2020.
Wizkids has als announced starship & space station interior as part of their 4D line for 2020.
The quality of the PF battles sets is normally superior to that of the Icons of the Realms sets. I buy the PF Battles sets knowing I'm paying a higher price for a better quality. If the quality went down in the PF sets I would probably stop buying boosters all together.