Twitter, artist/designer Guido Guidi (who you may know best for his work on Transformers, confirmed he did indeed contribute designs to Takaratomy's Beast Saga line-- and gave us a couple of names! He writes:
"Great to see some designs I did for Takaratomy "Beast Saga"
coming to (plastic) life : in this pic Coelence &
I'm assuming Coelence is on the left and Pirazon is on the right, but I guess we'll know for sure later!