"Our most recent info tells us that the red, green, and blue Pathfinder bases will be back in stock in mid September as will the Pathfinder Base Assortment bags. The Starfinder Base Assortment bags have moved to an October release and the Starfinder yellow, orange, and purple bases should be available around the same time."
Pathfinder Maps, Starfinder Roleplaying Game, Starfinder Society Subscriber; Pathfinder Roleplaying Game Superscriber
As pawn sets are mostly retired (there was one for Monster Core, but no planned pawn sets in the future) I think it's probably safe to say that we are not going to get more of the colored bases