Protégé

Protégé was a powerful supervillain from Marvel comics who came extremely close to becoming not only a deity but the new "One Above All": which is considered to be God in the Marvel universe..

History
Protégé was a cosmic entity and the child-like ruler of the Universal Church of Truth in the 31st century of Earth-691. Protégé, whose abilities to duplicate the powers of others allowed him to manifest the Living Tribunal's own power. The Guardians of the Galaxy struggled futilely against Protégé and the Living Tribunal itself wasn't able to defeat him and stated that any and all realities rest on Protégé's shoulders.

Protégé claimed to have become not the new Living Tribunal, but the new One-Above-All. It was the Celestial named Scathan The Approver who saved all realities by judging against him. The Living Tribunal then absorbed Protégé into itself to prevent him from endangering all realities again.