there are no requirements. You can do what you want if you co-mapmaker accepts what you do.

Creatively none, but there are some basic requirements:

http://wiki.warlight.net/index.php/Map_requirements

Are you asking how to get your map into the featured map category?

If you are asking this, I think you'd have to be both really lucky and really nice to Fizzer.
Realistically speaking though I think I'd be impossible, sorry.

Green you are such a killjoy. People can hope can't they? :)