Well, this bit of information from IGN Dreamcast proves that the Japanese get all the luck when it comes to video games:
Bayman, a character from part 1 who was mysteriously absent from part 2 is now in the game. Additionally, some of the stages from the original Model 2 arcade game have been included, complete with danger zones. Finally, the new screens reveal all sorts of costumes, ranging from naughty swimsuits for Ayane and Lei Fang and Tina’s old Player 2 costume from DOA1.
No, still no word on whether this version of DOA2 will be re-released to the DC in the States.