I don't care what makes DLC so long as Leon's Desert Marauder, Bayman's green military outfit, and Hayabusa's Tekken Lord (that's what it reminds me of) get in over the naked apron and other fetish costumes.
Got a few ideas, as well, like a DOA++ pack. Each characters unique costume from DOA++ For reference, this is...
Kasumi's C4
Hayabusa's C1
Leifang's C1
Zack's C2 (since C1 already made it in)
Jann Lee's Shirtless outfit (Since his C1 already made it in, but I'd take his DOA1 C2, too)
Gen Fu's C1
Tina's C1
Bass' C1
Bayman's C1
Ayane's green outfit (Since her C1 already made it in)
Also, I'd love to see Jann Lee's DOA4 C1, and especially Leifang's DOA1 C1.