Until now all the info that we have about DoA5U comes mainly from the official site: about the DLC outfits he say that DoA5U will include
Pack1
Pack2
Pack4 (only the Bunny outfits ANGEL, EVILS and DOATEC DIVAS)
Pack5
Pack9
So remain excluded:
Pack3 (Gym class, Uniform, Special Set2)
Pack 4 (The part of the DLC about the first set of Swimsuits outfit, the ones released with DoA5 Collector's Edition)
Pack 6 and Pack 7 (The full Christmas set)
Pack 8 (The second Swimsuit pack called "Hotties Swimswear)
Pack 10 (The one released today, with the "Hot Getaway" set + "Cheerleaders" set)
For more info look always these pages
http://teamninja-studio.com/doa5/us/dlc.html
http://teamninja-studio.com/doa5/ultimate/us/home.html#features
PS: The english version of the Feature page from the DoA5U site, translated wrongly the Included Pack
9 "Fighters pack" as Pack
6