Marvel Comics has released a new teaser for a project by Steve McNniven and Cullen Bunn dubbed MU.
The most obvious assumption would be that "MU" stands as "Marvel Universe," as it's an abbreviation the company and many fans have used decades. That could infer some over-arching title encompassing the entire "MU."
A real dark horse candidate for this would be the fictional 'lost' continent of Mu, which has been featured in Marvel Comics sparingly from the 1940s with Namora to the more recent Agents of Atlas.
MU, as its known currently, is said to be released in January 2017, with Marvel promising more information on Thursday, September 1 at 6:45 p.m. ET.