My guess is that it's going to be HEAVY heavy metal, especially because Mangini "is an animal" and his previous works were super heavy with annihilator and whatnot. Blastbeats, HWAAARRRRRGGGGgggs, 300 bpm double bass, 1-3 crashes per second, etc.
I have been sort of gravitating toward prog rock though, with neal morse's stuff- trans, SB, solo works. But if this is similar to Train of Thought in atmosphere or song structure, then I'm in.