He is Scourge minus the name since they probably want Scourge to be the herald of unicron with the zz top beard.
Yeah this Predaking is pretty obviously Scourge inspired here. Even his robot head kind of looks like Scourge's helmet but stylized a bit. I do like the idea of using combiner names for bigass robots that don't exactly combine, it's a good thing, would be sweet if we got, say, a PIRANHACON that is actualy a huge robot that transforms into a Kraken creature.
Keeping my preorder. If I find out that he's larger on the show I'll get the larger toy version as well.