Capcom of America is heading up this NES Mega Man re-release initiative. The compilation will be ported by and enhanced by Digital Eclipse which has done great work in the past. It will be for PlayStation 4, XBOX One, Windows, & 3DS - there are "no plans" for Vita and Wii U releases. It will be digital-only and cost $15, which is a lot better than paying $30 by buying each game individually on the Virtual Console for $5 apiece.

The press release reads:

Quote Originally Posted by Capcom of America
Mega Man Legacy Collection is a celebration of the 8-bit history of Capcom’s iconic Blue Bomber. Featuring faithful reproductions of the series’ origins with the original six Mega Man games, the Legacy Collection will remind long-time fans and introduce newcomers to what made Mega Man such a popular and iconic character. Mega Man Legacy Collection will feature all six games and more for an MSRP of €14.99 / £11.99 this Summer as a digital download on PlayStation 4, Xbox One and PC, and this Winter on Nintendo 3DS.

In addition to the six Mega Man games, Mega Man Legacy Collection features new ways to experience the classic games with the Museum Mode and new Challenge Mode. Challenge Mode remixes gameplay segments from all six games, with plenty of scaling difficulty objectives for experienced players to conquer yet serving as a good starting point for new players, too. Museum Mode contains a comprehensive collection of history, high-res art and original concept pieces – a mega treat for any fan of Mega Man and video game history.
A lot more details can be read at the source links below.

Source 1: http://www.rockman-corner.com/2015/0...announced.html
Source 2: http://www.capcom-unity.com/brelston...-new-platforms