Grant as good guy turned bad (turned good)
With the first plot twist (Grant meeting up with the three bad guys in the hotel room), was anyone skeptical that Grant was legitimately working with them, and was instead using them? I get the feeling that Grant didn't seem the type to play sleazy villains and was too well-established as a hero type (though I'm sure there are exceptions).
Once it seemed like Grant's character actually was a bad guy who was impersonating Dyle's brother, and chases after Regina, I though it was a more interesting twist. Alas, it turns out he actually was a good guy after all. I loved the movie, and the leads, but I sort of feel like Grant's reputation affected how I saw the plot unfold.