^Unlikely, but I agree. This 'boss' is more fit to be a mini-boss. A realizing of Griffins (GoWII) as they were meant to be. Actual large foes that can be fought in real combat with ground and air attacks. Even if just a flying Cerberus, it would be lovely. Particularly a "Breeder" variant (more annoying than ever with flying 'Seeds').
Another part of the sentiment is the multiple boss encounter. We don't get enough of this. Lahkesis/Atropos was the first taste. I'd hoped for Artemis/Apollo in GoWIII, but it wasn't to be. Castor/Pollux seem to share one body, so I can't put my hopes on them in this entry.