Posted on Comic Book Resources, the three watercolour-and-parchment style images each feature a different icon.
The captions simply read: "They are coming," with a release date of May 2.
The 2000 AD and Judge Dredd Megazine publisher recently announced its move towards synchronising its print and digital releases.
> 'Judge Dredd' artist Chris Weston returns to title
> 'Judge Dredd': Grant Morrison, Mark Millar collaboration collected
A rebooted Judge Dredd film starring Karl Urban is due out in the summer.
No more details about the mystery project have been revealed.