I think it's pretty evident that Bale can't "open" a non-Batman movie, just like Hugh Jackman can't open a non-Wolverine movie. At least, not by himself. He's a well respected actor, not a movie star. Then again, that's not uncommon these days. Outside of Will Smith, which star guarantees an opening? Even Depp, outside of POTC and Willie Wonka, isn't a huge draw. (Heck, if Julie & Julia does The Devil Wears Prada / Sex and the City / Mamma Mia (domestic) business, it might be time to consider Meryl Streep a star that draws people in.)
I do think it would be a wise decision though for Christian Bale to vary up his role in a big mainstream movie. I don't think anyone is suggesting that he take a role without substance, but a conscious decision to take a high profile role that's less serious would probably be a good choice at this point. Heck, if there's a romantic comedy out there that's on par with It Happened One Night, The Apartment, Annie Hall, then he should consider a rom com.
I do think it would be a wise decision though for Christian Bale to vary up his role in a big mainstream movie. I don't think anyone is suggesting that he take a role without substance, but a conscious decision to take a high profile role that's less serious would probably be a good choice at this point. Heck, if there's a romantic comedy out there that's on par with It Happened One Night, The Apartment, Annie Hall, then he should consider a rom com.