"That door in Franklin’s room separates who he is from who he can be, and he doesn’t have to walk through it; he can run. The door has roughly the same dimensions as a blank comic book page, and in all three of these landmark runs, the writers didn’t walk through that door; they ran."The AV Club on the end of Hickman’s FF, Gillan’s Journey Into Mystery, and Brubaker’s Captain America.
(Source: The A.V. Club)