Superflat Biomes

Obviously not all of the Normal biomes would work in a superflat world, but I think that having an option to generate a superflat world with applicable biomes would greatly enhance the customizing ability of the superflat option. You could still spawn in a plains biome, but could come across a savanna, a desert, a meadow, a tundra, maybe a shallow ocean, etc, as long as it could still be recognizable as that biome within the height/depth restrictions of superflat world gen.