The Batman way.
Batman Day is here again, and that means goodies in DC Universe Online. Players who log in can claim a bundle of goodies including a Batman doll accessory, Batwing base pet, sixth dimension Batman emblem, and a Batman poster pack. Members can log in and grab an additional flying jester blimp pet and an enhanced sixth edition Batman emblem.
All you have to do is log in between the 16 and the 30 of September.
Source: DC Universe Online
MMO Fallout 