Like the mythical Unicorn, sightings of a plastic Thunderhawk Gunship crop up once in awhile. While ellusive, this beast of a model would be a community favorite if released. For now though, here is another sighting.
Also of note, this rumor mentions Death Korps of Krieg being rolled into the new Imperial Guard codex that is rumored to being worked on. While I can see this happening in the background, it would be difficult to go beyond that.
Please remember that these are rumors
via an anonymous source
&*(&^ said he's seen the plastic thunderhawk in the flesh AMD said it may breach the £100 barrier maybe 120-140. He also mentioned kreig may be getting folded into the 40k IG book.