Six new pets (three Battle and three Companion) pets were datamined in the latest Patch 10.1.5 build. Currently, there are no sources for these Battle Pets, but these will likely come from Time Rifts and Whelpling dailies.
New Battle Pets from Time Rifts in Patch 10.1.5
These are normal battle pets that can be used for battling. These pets will likely come from Time Rifts.
