I find it really difficult to tell one actor/actress from another. There's a generic quality to the attractiveness of certain actors. Overall, not interested in these sort of folks.
Even if you ignore the conspicuous absence of Chris Hemsworth from this joke, it's clear we've stumbled onto something. Either it's an incredible coincidence that a bunch of similar-looking, similarly-named, ex-A&F model actors all managed to land roles in superhero movies, or it's a massive Chris-spiracy!
Also, isn't it surprisingly easy to imagine The Rock playing all of their characters (and somehow doing an even better job)? If the guy wasn't already so busy making other movies, I'd be more disappointed he wasn't.