Okay, how about we make a set. I have no idea what it will be, or what the story shall be. But I think it will be a fun experience. First, I think we should choose a world or a world prospect, and, sometime in a few days we'll host a vote on the world. We can go on form there. Feel free to suggest any ideas.
Here are some cool worlds that have gone unvisited: http://magic.wizards.com/en/articles/archive/savor-flavor/planes-planechase-2009-12-30