i'm just afraid if they do that, you run the risk of getting Bane from Batman & Robin. nobody wants that shit, and Thor's probably the toughest sell of the Marvel movies to begin with.
To me, the reason Bane sucked so bad was that he was such a cool character in the comics and wasn't just a henchman. Plus, the yellow skin and overall shittiness of the movie didn't help.
Skurge has been used as mostly just a big henchman type many many times over the years, in fact that's how they've treated him on the current cartoon, and I've loved the way they've used him. Plus, if the movie is good a silent badass is a fun character that works well. See Die Hard, The Raid, any movie with Bolo, etc. for examples.