Cubicle 7 explains why its fantasy RPG based on Warhammer: The Old World will be a separate game and not a line of supplements for its existing Warhammer fantasy RPG, which is called Warhammer Fantasy Role-Play

Games Workshop’s return to its original setting The Old World in the tabletop wargame Warhammer: The Old World seems to be working out. They’ve dropped a hint about adding Cathay as a future army—a plan they’d previously backed out on—and last year Cubicle 7 announced a tabletop RPG to accompany the wargame.

Players of Cubicle 7’s Warhammer Fantasy Role-Play 4th edition were a bit surprised by this, given that it’s an existing and well-supported tabletop RPG set in Warhammer’s Old World. But while that’s been hovering around the Old World in the year 2512 by the Imperial Calendar, the Old World wargame is set hundreds of years earlier in the setting’s timeline. Still, that’s something you could cover with a supplement to the existing game that describes how things were different in the preceding period, right?