I agree it is super that the C&O 2-6-6-2 is to be restored, and very cool
But it is not superpower- a Mallet, that is compound can't be.
The design of the late C&O Mallets was pretty much the same as the USRA 2-6-6-2s, I believe also owned by C&O, ca 1919 a few years before Mr. Woodward and his SuperPower.