(Pops in) Boo.
I've played and purhcased both of those Megaman collection sets.
Megaman Anniversay Collection crammed in the original series (1-8), along with two fighting games that were Japan only, not to mention some remixed songs, pictures, and other unlockable crap.
The Megaman X Collection had, well...the X series (X1-X6), more unlockable crap, and a never released racing game. I never unlocked that one, though...I can't beat any of them all the way through.XD
And now for some opinionated comments on the series.
Yes, it's being milked, like the well known blue animal who has a ring fetish, or a pair of plumbers who go after a princess who can't stop getting kidnapped by some lizard.
(Note: I've been dying to say that for years...)
However...they're at least putting a bit more effort into it now. Megaman ZX is a good example of it. I mean, sure, it doesn't do anything with the touch screen (That I know of), but it's fun as hell. ^_^