Reshiram is White's legendary and Zekrom is Black's. The pre-order box art says so.
What is weird is that White's box has a black background and viceversa. Maybe it's like that so you can see the Pokemon.
why do they exist..
The black one reminds me of Palkia except it has a drill for the tail. The white one.... just looks like a bad fakemon.
5th gen -_-
I wasn't expecting some fantasy MMORG or whatever monsters as the title legendaries. They barely look like Pokemon.