Ohohohohohoh!
I've been having a certain idea ever since I heard that there will be another LMAT..
A fantasy world, with shiny purple-ish blue-ish rock, gemstones here and there, but at the same time, vivid flora. Original Rayman style, you know. It's not THAT original, but I think it could be pretty, and the initial style of this tileset is just about dreamy and cartoony while still pretty enough..

Examples...
http://www.gameloft.com/pub/pict/03_BlueMountain_04.jpg
http://www.kmgassociates.com/rayman/screens/nlmtns2.gif
http://www.kmgassociates.com/rayman/screens/nlmtns4.gif
http://www.kmgassociates.com/rayman/screens/nlmtns1.gif

..except more colorful and shiny.