If Hasbro do release Groove and Blastoff, that's four "extra" limbs which along with one of the extra torsos (pick from Optimus Prime, Cyclonus, Battle Core Optimus Prime, Sky Lynx, or Scattershot) is enough to make a complete extra combiner. Pretty cool for those that want the full Geewun but have already bought the Hasbro versions with the new limbs, or for those who just want to make another new combiner with the extra releases.