No not kill it by cancelling it, although they have done that before!
Recently it was announced that Futurama was picked up for a new season(Great right?!) But now aparentely Fox is trying to recast all the main voice actors (voices of Fry, Leela , Bender, and pretty much everyone esle). Seems to be a big cheap out so they can hire low-aid new voice actors instead of the talented cast that made the show so great.
You can read the full news here, along with the email address of the casting director if you want to complain about this. I now I will! [link]