It maybe that TPTB wanted to release Children of Kerensky before they debuted any brand new Ghost Bear Mechs, so that there would be extra context when they mention Mechs designed by The Warbear. Also, none of the Ghost Bear classics have been featured, yet. Once the Mad Dog, Executioner, Viper, and Fire Moth show up the Ghost Bears will likely be 4th among the Clans featured in the RecGuides, after the Wolves, Falcons, and Sea Foxes. Also, the Recguides, even if they haven't featured any new GB Mechs or configs, have made it clear that the Dominion is still building Mechs, and buying Mechs from the Foxes and Ravens.