I have not heard of this. As a Tyranid player, I'm friggin hyped for it. Nids had an update for 2nd, 3rd and 4th Edition that changed a LOT of the models and since I'm a 3rd Edition player with about 90% of my models from that age, the new stuff sticks out pretty bad. I really hope they go that far back because that entire line looked amazing. Ripe for converting too.
Oh, and the old Dark Eldar Jetbikes. I love those too. They make awesome bikes for Corsairs since the gun is so easy to swap out. I could use another 20 of those.