Of course there are more Tyranid pics being revealed, and this one shows the Hive Crone, the carnifex boxset, the size of the Exocrine, and the Tyranid Swarm box that we have been talking about here on Faeit 212. Everything that we have been talking about is starting to show up now.
So check these out, and note that until we see something official, these are still considered to be rumors.
http://astropate.blogspot.com/2013/12/nuovi-tiranidi-carnifex-sciame-tiranide.html