For the avoidance of doubt I'm going to restate for everyone's benefit that this is a One Universe roleplay and not an Ultimate one.
That means that Matt Murdock of the New Frontier world is the same Matt Murdock of the 616 universe at birth. The events thereafter may have changed slightly due to the fact he grew up in the same world as Superman, Green Lantern, The Flash, etc. For example, Dr. Strange may not be the Sorcerer Supreme of the New Frontier world if a DC mystic is deemed to be more powerful than him. That's not an existential change to the character but a byproduct of the characters having lived in the same world.
Fundamentally changing a character outside of these parameters is not acceptable. You need to explain how said Marvel or DC character coexisting with their other company counterpart has caused the changes you wish to make.
Are we all clear on that? Because it seems like there is still some confusion.