The Capcom-Unity Blog announces plans to release Street Fighter X Mega Man as a free PC download on December 17th. This is a throwback-style 8-bit game, as can be seen in this trailer. Here's word:

As the Street Fighter anniversary ends and Mega Man's begins, we are proud to reveal Street Fighter X Mega Man, a free PC download coming on December 17th. This 8-bit-style crossover title stars the Blue Bomber and a slew of retro-ized SF mainstays acting as stand-in Robot Masters; beat them, acquire their powers and tackle the next amazingly re-imagined boss.

Again, yes, this is a free game, delivered via Capcom Unity's Mega Man brand page. Simply come back on 12/17 and get the whole thing on the house. As a real blend of two iconic franchises, it's an amazing way to send SF25 off in style, and kick off MM25 with a bang.