I think an FPS would be a difficult proposition. Not so much to acquire one, but because we'd be competing against quality games on both PC AND consoles, all of which have online multiplayer nowdays. If a person can pay their Xbox live subscription fee for the year and buy, say, Gears of War 2 - or if a person can just bust out their PC and something like Team Fortress 2, our FPS game would have to be pretty darn amazing to make people not only want to play it, but ALSO want to spend AP on it. And it's also a tough proposition because introducing "buyer benefits" in a skill-based game like an FPS would annoy a lot of players, and many would probably leave thinking, "What does it matter if I get to be really good, if someone can just buy stuff with AP and trounce me every time?" It's one sort of competitive game where, when the playing field isn't level, the game quickly becomes not-fun.
I think we should look to add a high-profile Japanese MMO, personally. Over the last few months, we've gotten a lot of smaller games, but none of them in particular seem to be making waves. But when you snag a bigger-name title, people notice. I think there has been more interest in Shin Megami Tensei: IMAGINE than on the last three or four "smaller" games Aeria acquired before that, combined. A bigger name draws people in, and it helps pre-establish a community for itself, which is incredibly useful, and makes the game a more fun, social experience for all involved. Honestly, I would look into getting something from Square-Enix, if possible. From both the localizer's side and a player side, I'd like to be involved with a game where the interactions with the developer are smooth, and you can know what to expect.
Other than that...has Aeria looked into Ragnarok Online 2? I think that'd be up our alley, definitely - both as a good company acquisition, and something that'd be appealing to a lot of our playerbase. Overall, though, my suggestion is: add another "big" title as the next one, because it will have more gravity (not to mention, it also generates us more publicity, so we can continue to grow).