honestly, I've seen this, and I liked it. I thought the drama scenes were done very well, hiding the CG within reasonable levels. I think the CG allowed the Action/combat scenes to be more outlandish than a real cast could ever have accomplished. I was sitting through the movie just thinking... wow... this would turn into a kick-ass story for an Exalted
tm game.
and for those who seem to be mis-informed on who is who's daddy, Grendel is Hrothgar's son, and always has been, in most of the versions of this epic that I've seen. The plot in this case was surprisingly sex-related (but with animate Angelina, what else were we really expecting).
I have cooked up a subtitle for this movie: The Queen's Quest for Some Pussy.
Once you watch it, you'll understand why

I can't go into more, without spoilers, but I really enjoyed the film, especially Beowulf's "little" story about "Sea Monsters."