Eh, I think you overestimate the people that buy limited editions with all that extra crap for the sake of it. At least with Atlus games, the core game itself is appealing to enough people and the extra swag might be enough to push them over the edge.
Unfortunately, shooters are a lost art in the west. Whenever a new one comes out, if it has unlimited continues then people just credit feed and bomb spam the game, beat it in an hour, and complain how the game sucked, was easy, and a waste of money (despite most games usually having extra content if you beat it with restrictions, although 90% of players probably never see it). Limit continues and you get people complaining about how the game is impossible. This is especially true of some Cave games in which a casual player wouldn't even beat the first level without continuing. It only appeals to a narrow market, one who enjoys the challenge and has the dedication to not continue but opt to make it farther the next time. Sadly, most western games do not have this mindset.
At least RFA gives you three games and there are some restrictions on the last level so you can't credit-feed through the whole thing. The Raiden name is also somewhat well-known in the west, I think. Combine that with the $20 price tag and there's really no excuse for people not to pick it up, but I certainly wouldn't expect strong sales. Future 360 shooters would be one game, which alone will cause plenty of bitching from reviewers saying that it should have been on XBLA. Hell though, buy RFA and tell all your friends to buy it, really push for it. If it sells well, you guys might get Raiden 4, and if that sells well, then the publishers know that there's a market for shooters in the west.
Oddly enough, I think Otomedius would have the best chance in the west, it's a game that's very easy to get into and you can scale the difficulty to a level that you find challenging but not overwhelming. There's probably no chance that it'll ever get released due to the game's content, however.
