Like this one?
http://www.rpgmakerweb.com/a/graphics/sci-fi-tiles and this one
http://www.rpgmakerweb.com/a/graphics/futuristic-tiles ?
That being said, I would love to see an even bigger expansion of the DS tileset if possible. I know there are a couple out there including the new Sci-Fi retro one that was released. But I feel like the painted tiles still out weigh the pixel ones.
EDIT: Reading back, I would love to see AwesomeCool's idea be implemented. A Dungeon Themed pack filled with various different dungeons to use and combine.
For example: You can have a basic Fire, Earth, Water, Forest dungeon as your A1-A5, but have the B, C, D, and E tiles be things like cracks, small dungeon details, and puzzle objects to place in the dungeons for users to event around and create clever puzzles for the players to solve. Bonus points if we can make it a DS thing