I went through the DC Comics Super Heroes and Batman categories of Brickset without being able to identify the origin of this bag of pieces.
The only information are 135149
and a year, 2011, written on it, but, apparently, this does not give any concrete information. The number 6062861
is written on a white box, and numerous pieces should give hints to identify it (Joker, Batman, 4 wheels, dynamite, flame, a big red "catapult").
It looks that it is not inappropriate to ask here for such an information (cf. Jourbac comment), and I don't know how to use Bricklink. Is it the first part of a larger set?