New images are showing everywhere, and even since the last time I checked a couple hours ago. These images appear to be from White Dwarf, and some of them in French. Take a look at both new models for the Tyranids this week.
In the leaks you can now see both models, the Maleceptor and the Toxicrene quite well. Of course I still prefer to wait on my opinion on these guys until we get a good video release from Games Workshop.
Here are some links that are appearing on the forums and web
If you are curious to know what these two monstrous creatures are and what they can do, here is a link with information on each new model.