How so the only thing in common with Trismagia is it too is a floating head....nightmare???
I found it similar to the Trismagius fight because you fight a giant floating head on a round platform with a trippy background. My memory of DMC 2 is foggy but I think Trismagius had similar attacks to this boss.
Nightmare was that blob-like boss from DMC 1 where you had to hit these switches in order to expose Nightmare's core, the only part of it that could be hurt. The Raptor News boss kind of has the same idea where you see Dante hit these switches on the ground and it looks like it hurts it or leaves it open to attack.
Also, Nightmare had this ability to absorb you into itself and the only way to escape is to kill all the enemies in the room with you. The Raptor News boss does the same thing, when Dante went inside of it's eye and fought those enemies and escaped after he killed them all.
Plus Nightmare, this boss, and Trismagius (I'm not sure about this, though, my memory isn't very good) have a giant beam attack.
I apologize for the long reply.