It's been pretty quiet on the Virtual Console front when it comes to Mega Man. Actually, come April 19th, it will be approximately one year since the last VC release, Mega Man 4. When can we expect Mega Man 5 and so on? In response to this very question on Friday's Ask Capcom Live, the Capcom crew had this to say:
"I don't know. Mega Man one though four were put online by the online group in Tokyo," said Christian Svensson, Capcom's VP strategic planning and business development. "I don't think Mega Man 5 or beyond are on route but the original four popped up at short notice so I wouldn't rule it out."
Following up on this response, Svensson returned with some additional details on the Ask Capcom forums:
"I answered this on the Ask Capcom stream on Friday... and my answer was, unfortunately, I don't know. VC projects (pure emulation ones, which don't require new development) don't show up in our usual product roadmap and often come to us with very short paths to market. I'm not aware of more projects headed to VC in general at this time. Again, that doesn't mean there aren't, but they aren't on my radar at the moment."
Long story short, future Virtual Console releases aren't in the cards right now, but that may change upon short notice.
In the past, there was a bit of a pattern when it came to VC Mega Man releases. IIRC, Mega Man 1-3 released on the Virtual Console as a means to promote Mega Man 9, with MM4 coinciding closely with Mega Man 10's release. Seeing that there are no Wii-based Mega Man projects in the foreseeable future, I don't believe this strategy will apply for quite some time.
Best advice I can give: if you're hankering for some classic Mega Man action on Wii, pick up a copy of the GameCube version of Anniversary Collection. It's not that expensive nor too difficult to find. Otherwise, fingers crossed and hope for the best.
Source: Ask Capcom Live, Ask Capcom Forums