This was going to be a released but was unfinished and turned into something new. I can't tell you because it's coming. Well, it's here Scratch MW-LEVEL-MAKER 

It was now called the level maker. You see thinking up a title with modern warfare in it would be tough to think if it was a creation game.

That in the map Block Arena There's a skull drawing and below is a note, "Da Ghost"?

This is leading to a lore thing, but more of a secret also.