Most of these costumes ain't bad, actually - I could see Bruce being either the Owl or the Shooting Star without changing much of his backstory (he did, after all, briefly change his identity to 'Starman' at one point - no relation). The Stingray and Scorpion identities would necessitate a considerable change of scene, and the Dark Knight would only really work if the armor were something like Iron Man's (which, given his resources, would not be impossible). Still, they're all at least plausible.