Hm. I'm not yet sure whether I like it or not. It's definitely a different take on Grendel...
...it's just that the dialogue here seems more like something you'd hear from a medieval concept of a devil than an Anglo-Saxon concept of a semi-humanoid lake monster.
The head's also very...generic. Looks like a cheap Halloween mask. Grendel should look more...unique. Is this another case like Beowulf's appearance in Wonder Woman, where DC comics has a mandated design for the character?