Exactly.
Plus, it would be really weird (and stupid) not to promote a newcomer. I mean, that's the best strategy to encourage undecided people to buy DOA5 at the store. "Should we buy TTT2 bro ?" "Are you crazy ? Keep your money for DOA5, remember that hot red chick with big boobs ? I'm planning to main her, just wait 2 weeks bro, loll xDD blablablabla."
And TGS is the perfect moment to appeal to the VF fans with a big VF trailer (Pai, Sarah and Akira), especially because Sega fans will watch TGS. And they will be like "hmmm... at first I wasn't sure DOA would be so great, because I don't really like Sarah and Akira.. but now that Pai is confirmed, I'm totally going to buy it, lololol xDDD blablablabla."
And then Gen Fu, Alpha later in September, because no one really care about them. I mean, people who don't know the franchise prefer the ladies or the cool guys, not the old fart and Lady Toothpaste.