Update: This was my response when this news hit. The problem has since been resolved, and the original voice cast is staying.
I heard news that the revival of Futurama has been approved by Comedy Central, but that they could not come to an agreement with the voice actors over pay. They have even already put out casting calls to replace the entire cast.
There's still time for this to be resolved, and Comedy Central might just be playing hard ball - but, really, if they can't be bothered to pay the original voice actors what they deserve, then they should just scrap the whole project.
I love Futurama, and was elated to see it come back on DVD the past few years. The idea of the show successfully being revived (which it richly deserves) was like a dream come true. Now this happens. Without the real voices of Futurama, it's like the soul of the series would be gone. Would anyone take The Simpsons seriously if Homer and everyone else was suddenly voiced by different people?
If Billy West (Fry, Zoidberg, and the Professor), Katey Sagal (Leela), and John DiMaggio (Bender) aren't doing the voices - then I simply won't be watching.
I seems like the networks are doing what they do best - Ruin quality shows, now even before their on the air!