I'm going to start this, right here, right now.
If AAI 2 is NOT localized before this is released, if it even makes it to the states, I'm not going to buy it.
I want as many people with me on this as possible. I want Capcom to know we're not going to take their bull
anymore!
Fight for what's right! Localize AAI 2! 
I don't know if this makes much sense in the long run. On one hand yes, it sucks that this game hasn't received localization. On the other hand, we already know that if it's going to be released, it isn't going to be on a physical DS cartridge. It will likely be digitally distributed. My guess is through 3DS eShop and iOS if anything comes about.
Nextly, if by some miracle they localize AA5, wouldn't it be smarter to buy it and show support for the series? I admit that I'm no expert on business practices, but AA5 selling well would make a better case for localizing a less popular (has to be said) spin-off series of the AA series. Regardless of the fact that AAI2 is an actual improvement over AAI, the company needs to be more confident in the sales forecast for the game to get localized.
Of course, this could just be me reconciling my poor self-control and sincere hope to play another game with Apollo, but I think I'd have to go ahead and put one in the buy AA5 column for me.