According to Digital Spy:
|"...Craig Charles, Chris Barrie, Danny John-Jules, Robert Llewellyn and Chloe Annett will appear in four 30-minute specials that will combine new material with classic footage"|
"Robert Llewellyn, who played android Kryten in the cult hit, has announced that BBC Worldwide has commissioned a one-off 60-minute episode.
The script will be filmed in October for release on DVD next year."
I will always welcome new RD episodes but if one of these ideas must happen, I really hope that it's the BBC 60 minute special, just so we can tie up all loose ends on the saga or at least conclude the cliffhanger ending to "Only the Good". I wouldn't say no to both ideas going ahead though!