User blog:ShadowsTwilight/ Christmas Event Contents

Contents of the DCUO Update 7: Christmas event in as much detail as possible.
 * A new mission that has heroes trying to save presents and villains destroying them, both fighting off Orange Lanterns in the process. This mission is issued daily and offers three Holly Leaves. This mission is offered by Hal Jordon in the Watchtower's Monitor Womb for heroes and by Sinestro in the Hall of Dooms's Broker Room.
 * A new vendor which you can purchase holiday themed items including:
 * an elf costume style set
 * cookie consumables
 * trinkets
 * a peppermint/candy cane themed style for each weapon style.

These items are purchased with Holly leaves.
 * Metropolis and Gotham have both been decorated for Christmas, with lights and wreaths hanging off of the trees and light poles. In addition to the physical decorations, the background music for both cities have been switched a more festive tune.
 * Instance bosses, in addition to their standard drops, now drop holiday themed items, such as a trinket that turns you into a snowman and a consumable that allow you to throw a snowball.

More information as I find it.