Well, that's the thing. With, say Nintendo titles, there's also a game-by-game aspect that has to be considered. If it's a marquee title in question (ie anything with Mario, Pokermon, Zelda), then there's no way they'll drop in price officially. But if it's a smaller title that they're only publishing (irregardless of who's developing), then it's likely to drop in price along the same curve as other games. Case in point: Excitebots, Metroid Prime Trilogy (only one printrun), Wario Land: Shake It, etc. And to an extent, even Animal Crossing Wii fell to the latter.
tl;dr Yeah, Nintendo is the worst when it comes to being a CAG but everyone else will be there to pick up their slack.
And I look forward to PoP: The Movie: The Game, Trauma Team, SSF4, RS2w/WM+, Castlevania, Alpha Protocol (when it gets released next year), Resonance of Fate, Arc Rise Fantasia, MMZ Collection, and Sin and Punishment 2 all at 20 bucks or under.