UPDATE 7/21: The band responded to the rumors by stating:
The emo music scene was in shambles when My Chemical Romance broke up in 2013, many fans begging for it not to be true... Three years later, things may finally be changing.
My Chemical Romance have uploaded a video and new images to their Facebook page, the images branding a new logo featuring "MCR X" (MCR 10?) around a cross figure. The video shows the same figure waving on a flag with the signature piano intro of 'Welcome To The Black Parade' over it, the cryptic date "9.23.16" (September 23, 2016) appearing at the end. What could it mean?
My Chemical Romance broke up in 2013 following the release of the Conventional Weapons series of releases. The band has stayed mostly quiet since then, releasing their Greatest Hits compilation May Death Never Stop You and some isolated merch along the way. Gerard Way launched his solo career and took time to focus on his comics, while guitarist Frank Iero also continued on with his solo career.
There are many possibilities as to what this could mean. The most logical answer: a ten-year anniversary tour for The Black Parade, which was released October 23, 2006. October 23 is exactly a month off of September 23... it all seems to align. Whatever the band has in store, it's bound to be a big moment for fans.