Working with the International Astronomical Union (IAU), the New Horizons team plans to assign names to the features on the maps of Pluto and its large moon Charon, once we have seen them in sharp detail this summer. At this site, you can suggest your ideas for names and vote for your favorites. The team will use your best ideas in their proposal to the IAU.
http://www.ourpluto.org/home (http://www.ourpluto.org/home)
From the list - Z'ha'dum seems like a nice name (planet of Shadows-Babylon 5), though you can never go there.
If your a fan of the show you know why (rhymes)
Plains of Arrakis, Mordor, Barad-Dur for any tower like structures..