A common complaint from fans about the Combiner Wars Optimus Prime and Motormaster toys are that their hip ratchets make it very hard to stand the toys up when combined with the Combiner Wars Deluxes. It seems as though Hasbro has heard the complaints, and has retooled the hips on Combiner Wars Battle Core Optimus Prime to allow them to lock out in a more vertical position in robot mode – making it much easier to pose the combined form, Optimus Maximus.
Reports state that Takara-Tomy followed suit and used these fixed ratchets for their release of Motormaster in the Unite Warriors line. Motormater is due to ship alongside Battle Core Optimus Prime – it remains to be seen if these Wave 4 repack Motormasters will also feature the new hip ratchets.
A big thanks to TFW2005 member Payres for bringing this to our attention.