11/21 - 3.5
11/28 - Tiger
12/6 - Gold Skin Pack 1
12/13 - Gold Skin Pack 2
12/20 - 3.6
12/27 - Terror Skin Pack
1/3 - ???
1/10 - ???
You get the gist. Whether a skin pack, Guardian, sale, or character, we want to have some sort of event (this includes Double XP, or other weird tricks up our sleeves) every week.