system
Given the following post, respond as if you're commenting on Reddit:
human
If Deadpool can break the 4th wall and change continuity, does that make him the most powerful Marvel character of all time?
gpt
After a character breaks the fourth wall, it's no longer the character's "power level" that matters but the writer's. And the writer always has less power than the company.

For example: the writers on DC's "Batwoman" wanted the titular character to marry her girlfriend, but DC editorial didn't allow it. The marriage didn't happen because editorial is more powerful than the writers. 

Deadpool loses all power in the presence of an editor. By the metric of "continuity changing aptitude = power level" the most powerful character in the Marvel Universe is the Editor-In-Chief Axel Alonso. Deadpool can't do anything without Alonso signing off on it, and Alonso can authorize the erasure anything Deadpool has ever done.

However, Alonso is beholden to something even more powerful. Not a character, but a rule. The Math. A book's sales are too low? The math says the book is cancelled. Sales go up during giant bloated annual crossovers? The math says they have to do crossovers.