An analysis of comic book storylines suggests that Marvel may be repurposing some of the unrealized concepts from the canceled Miracleman: The Dark Age through David Colton's story and clues left in Avengers: Doomsday #5. However, this interpretation remains a fan theory and is not part of Marvel's officially announced future plotlines.
The originally planned Miracleman: The Dark Age was intended to conclude the related comic trilogy, but the project was later shelved. In previous stories, Miracleman established a utopia dominated by himself in his own universe, while also laying the groundwork for the collapse of this order and further conflict.
Combining existing plotlines and past interviews, the analyst speculates that if Miracleman loses his original world, he might travel to the main Marvel Universe and come into conflict with heroes who cannot accept a single superpowered individual ruling the world.
This new basis for speculation comes from Avengers: Doomsday #5. When Tony and Reed discuss the power David Colton gained through the Box of Origins, they point out that there is no known counterpart to this power in their world. Based on this, the author infers that the original Miracleman may already be in the main universe, either still in hiding or unaware of his own powers.
Furthermore, Colton's attempt to unilaterally make decisions for the nations of the world echoes Miracleman's past path to rule. However, the original Miracleman's identity, location, and potential conflicts have not yet been officially confirmed.