I hate that the dlc IS dlc, especially if it's already on the fucking disc. I miss the good old days when stuff in games was unlockable by doing stuff other than paying more money.
It would be a bit different if they had more new characters, rather than mostly alternates of stuff already in the game -- Iori/Kyo/whoever, yawn. In that sense, I am very grateful Billy is free.
But of the dlc they've announced so far, the one I care most about is actually the KOF '95 stage and music. Honestly, I don't give a shit about Iori. They can keep him. If I'm going to play as Iori at all, I'd much rather use the new version. But I have always loved that stage.