Given that the production costs of those titles have to be quite low by today's standards, that amount of sales has to be quite profitable for Capcom. Hopefully this means more Mega Man games in the future, preferably more 2D platformers, like a Mega Man 12 or Mega Man X9, because IMO that's what Mega Man was always meant to be.
So we can never have potential Mega Man spin-offs?
I honestly wouldn't be interested unless it was also a 2D platformer. I played a bit of Legends back in the late 90s and I hated it. It didn't feel like a Mega Man game. And other spin-offs have been in genres I care little for. When I think "Mega Man" I think the Classic and X series (well, at least the earlier X games, as the series started to dip in quality in the PS1 era and went completely off the rails when Capcom tried to forcing it away from a pure side-scroller when the series transitioned to the PS2). I think of the old-school formula of "pick the levels in any order, beat the boss, take his weapon, figure out which other boss is weak to it" combined with tight 2D platforming. Anything else I have no interest in, because none of them have given me any reason to be interested in them. Making it a 3D platformer just doesn't jibe with me, because I think some series just don't transition well to 3D and lose a lot of what made the 2D ones great in the process. Battle Network's tactical RPG genre is something that's never appealed to me. I'm not going to "broaden my horizons" and play games in genres and sub-genres I don't care for and don't think Mega Man is a good fit for just because it has "Mega Man" in the title.