I've been watching for ten minutes. I've noticed two similarities so far between this and Batman Begins, and I'm sure you guys can point out more.
Christian Bale is in some kind of prison in the beginning of both films, with a very similar color scheme.
In BB, Caine asks Bale how long he'll be staying in Gotham, to which Wayne replies, "As long as it takes." In Prestige, the hotel receptionist asks Angier how long he'll be staying, to which he replies, "As long as it takes."
Christian Bale is in some kind of prison in the beginning of both films, with a very similar color scheme.
In BB, Caine asks Bale how long he'll be staying in Gotham, to which Wayne replies, "As long as it takes." In Prestige, the hotel receptionist asks Angier how long he'll be staying, to which he replies, "As long as it takes."