new skin "theme" ideas

you know how riot has, for lack of a better word, "theme "skins? for example, headhunter, mecha, pool party skins etc. A jungle or amazon/voodoo theme would be great. maybe even an ancient Mayan look. like ashe and varus, have bows right, kalista and nidalee throw spears, wu kong and maybe warwick, gnar, rengar or teemo could be jungle animals, and malzahar, swain, and ryze could be voodoo witch doctors. another "theme" i though of would be ninjas. like the stereotypical dressed in all black ninjas. i mean, there is alot of great skin ideas/ concepts but they usually are only in visioned for one champion.