Team Skin Theme -> Bonus Map Skin

I just had the thought that Riot could make a bonus map skin for teams who theme their champs to the same skin theme.

For example, if all 5 champs use a PROJECT skin, their half of the map for that game is then PROJECT themed; or star guardian, galactic, etc.

Making a map skin a bonus for matching team skins could motivate more players to purchase individual skins given the promise of such bonus exclusive content. Plus, it would be really cool to see theme-coordinated teams and maps.

What do you think?