Quoted BoLS (with appropriate link)
"Alright boys, girls, and nameless entities to horrible to name, I just found this interesting little info on the net from Warpshadow on an upcoming nid Codex. Seems the guy spoke to Phil Kelly during GD Germany. Heres the jist ofthe info...
-4 New Tyranid species, one of which apparently will make the current fex look like a dwarf (Trygon?)
-Return of Nid Characters... Apparently they will be big creatures that have survived wthrough battlefields and evolved into something better
-Plastic Hive Tyrant (WITH WINGS!)
-Codex is already done and written by the same guy who wrote the Guard dex, models are beeing worked on I suppose and probably balancing issues (Like GW does that )
-Tyranids will have evolved ways to deal with all the mech thats been plopping up... Meaning anti tank/skimmer... I believe its implied that Biovores will once again be viable!
-Release next year
Original topic: First true rumours show up from Terrorfex
(oh, in case you hadn't heard, two of the Trygon pictures in Apoc were of the new plastic one according to GW sources)