It features characters including Superboy, Superman, Red Robin, Mr Freeze, Green Lantern and Sinestro, some apparently drawn by Francis Manapul and Frank Quitely.
"This week we are beyond excited to preview art from a project that is coming to your local comic shop very soon," wrote DCU senior story editor Ian Sattler on The Source.
"This is one of those great books that make us all stand around the editor's office going "wow". Can you guess what it is? Check this space next week for the full rundown.
"Trust me - you’re gonna want to see more of this."
There is speculation that the images are from a sequel to 2009's popular Wednesday Comics project.
© DC Comics