Week before that it was Casuals Vol 2. Week before that it was nothing.
They don't come every week, man. Never have. That would be some hefty shit on TNs part.
Only reason they have lately is because we weren't caught up with the WO outfits.
Well actually the week before the DLC Casuals Vol.2 n Japan was released i the Ultimate swimsuit outfit, a DLC relased before for the rest of the world that was unable to get the Collector's Edition including these outfits. This week happened exactly the opposite, with the Warriors Orochi outfits, DLC released in Japan long time ago.
Considering this, since the Sports Gear DLC the DLC schedule presented a new pack every weeks. Anyway it's also true that Team Ninja was able to make it through the release of old DLC packs (Pop Idols, Ultimate Swimsuits and Warriors Orochi), so in the end Team Ninja continued to do what made since the beginning: to release a new DLC pack every 2 weeks.
Personally I think that maybe next week we could see a new DLC pack, then the release of Kasumi's Ragnarok outfit for Ps3 and Xbox (this time maybe not free) ,and then another DLC pack. After this we will return definitely to DLC released only after 2 weeks.
Surely I think that soon we will have a Christmas DLC (with Santa outfits for the DoA5U new releases): if TN will make what I said over, this will come surely next week but anyway I'm not compleely sure of the schedule that I hypothesized.
About the Casual Pack Volume 3, personally from the words of Chin seemed me to understand that it couldn't be not exist, and that instead will be released a different pack with the characters that should have been included there (so Ryu, Leifang, Tina, Zack, Jann Lee, Bass, Helena and Leon). Considering that are all veterans of DoA, the hypothesis of a pack of classic outfits it's not excluded, but again this only if my interpretation is right (the twitter message was left vague).