Alex Ross and George Perez~ “Crisis Management” from Wizard Magazine, about the Crisis on Infinite Earths hardcover.
Just in case you want a ReCap: it is 5 feet long, and 2 feet high, and it contains over 500 individual characters. All pencilled by George Perez, and then meticulously painted by Alex Ross. Think about that for a moment. Doing that by hand. This is a hell of an accomplishment, for both of these guys!