gadgets aside, he is smart as hell and has been trained to be a ninja. pretty sure he could make his way to an airport somewhere and sneak aboard a few planes. they don't give the exact time frame so his journey back could have been pretty tough, but there's no reason to show all of that. we already know he's batman and is capable of incredible things, getting back into gotham ain't no thing.

>
>>QUESTION THO:
>>
>>How the hell did Batman get back to Gotham after he broke
>out
>>the damn prison? I was confused as hell like "Batman isn't
>>magical. how does this work?"
>
>Like the others, I gave it a pass-- it wasn't really on my
>list of actual gripes, but I did think: "This dude has no
>money, no friends, and no car... not even SHOES where he's
>located-- and isn't he in a different country? This prison
>isn't local, right? But... but he just... strolls up into a
>city... which if I'm not mistaken... is surrounded at every
>entrance by cops?"
>
>Again, like Triptych said, he's Batman, so I kinda just
>quickly rolled my eyes and got past it, but yeah, it's a
>convenient shortcut. You're not crazy for wondering, lol.