This was accidentally put up on the Forge World site earlier on:
The picture is titled 'Storm Eagle', which if current popular rumours are to be believed will be the new flyer available to all space marine chapters in the next round of codices. However the fact that it was leaked on Forge World probably means that it's a release they've got lined up rather than GW.
Either way, it looks completely awesome and in my opinion is what the Stormraven should've looked like. The only issue I have with it is that it looks a little too sleek and streamlined for the Space Marine design philosophy, but that's just me.
Overall Verdict: Bring it on! I want at least one for all three of my loyalist marine armies, one for my chaos, plus I'd convert one into a Pre-Heresy flyer for my Thousand Sons too