Tyranids are coming, and the leaks are appearing. There are a couple new models in the pics, from a flying beast to others that look like artillery. Not only that, but there are some rules leaks as well. Check this out.
Please remember that even though these are leaks, they are still considered to be rumors until we see something official.
Stay tuned, as more is coming.
http://40kwarzone.blogspot.ae/2013/12/new-tyranids-pics-revealed.html
via 4chan
New boxes and changes:
>- Flyer: Harpy + 2nd Flyer (not named Erinyes, 2nd flyer gets a weapon type that Tyranids never had before. Haywire potentially.)
>- Big Kit: Haruspex/Artillery Variant (Exocrine most likely)
>- Unit Kit: Hive Guard/Tyrant Guard (Tyrant Guard have several new weapons, Hive have an electric gun)
>- Unit Kit: Warriors (Includes parts for Prime, but no wings)
>- Repack: Carnifex, unknown what changed
>- Removed: Mycetic Spores on the game board are gone.
Rules
>- Psychic Discipline: Dominion (Primaris), Psychic Scream, Warp Blast, Catalyst, Paroxysm, The Horror, Onslaught.
>- Army-wide Move Through Cover.
>- Hormagaunts are cheaper and have fleet, but are not beasts.
>- Rippers are more expensive but are "no longer suicidal".
>- Gargoyles still have Blind Venom, same function.
>- Tyrants keep the twin devourers setup.
>- Broodlords have a fixed (no rolling) psychic power.
>- Tervigons and Hive Tyrants roll for random powers.
>- Tervigons can still be taken as Troops with a brood of gaunts.
>- New Instinctive Behaviours added. The effect is fixed per-unit, no rolling.