Metroid Prime 3's "failure" (selling more than Super Metroid oughta mean something, jeez) is always a scapegoat for some reason I have yet to decipher.
i think the point was that MP3's advertising was a failure. The only people who think the game sales were a failure are the ones that compare it to Halo 3, which came out almost the same time.
i think there is a lot of truth in Ian's post. Nintendo doesn't seem to know how to advertise itself very well. there are two great ads that come to mind, the nintendo characters running through the feild holding hands, then one slugs the other for smash brothers and then majora's mask one (which i saw in the movie theatre, made me want to play it there) but for the most part they either don't advertise, or just have print ads with release dates, etc.
maybe they think that nintendo power is all the advertising they really need?
excite bots is on my get / try list, it looks like a fun game, but with punch out and conduit right around the corner it had a strange time to come out.