The sixth Mega Man trade paperback from Archie Comics is available for pre-order here. Dubbed "Breaking Point", the book will chronicle issues 21 through 23 and the currently unreleased issue 28. What about issue 24? Don't forget; issue 24 through 27 will be released in the Worlds Collide trade paperbacks.
"Breaking Point" is due out on January 21, 2014 (yes, 2014). Secure your copy here.