Beowulf trailer begs the question: Good game, or another movie tie-in?

I was excited to hear that Beowulf would be made into a game way back in July when the screenies started to surface. Although the video above is every bit as epic as one would expect from a old poem of such stature, the first thought that hit my addled brain as I watched it was this: What makes a game that is also going to be a feature film stand apart from its big screen brother? Most film adaptation games are generally looked down upon, and I can’t help but worry that Beowulf will suffer the same fate. Do the films naturally overshadow the games?