Disclaimer: This might be confusing.. It seems to me that MP 10 Optimus is in scale with MP 11 and the upcoming MP's 12- 14. However MP 09 is almost a bridge between the original MP scale and the newer MP's. MP 09 Rodimus mode is in scale to MP 10 Optimus while MP 09 Hotrod mode is closer in scale to MP01 and MP 05 Megatron. Meanwhile Grimlock is not in scale to either. If Takara made a 12" Grimlock it could potentially scale well to MP reboot sizes.