We have had lots of rumors of what may be coming down the road for Warhammer 40k of late. Here is one more that would really push the limits of cool things that Games Workshop could release.
Please remember that these are rumors. The first part of this about the Necrons has been posted before (about 2 weeks ago)...... but is part of a continuing behind the scenes conversation. I kept it in, simply to show where this is coming from, and that it's not from some random source.
via Nostromodamus on Faeit 212
There will be a plastic Cryptek along with a new Destroyer Lord. That is all I am aware of for Necrons at this time. Don't count on too many new units until the ranges are fully converted to plastic.
As far as the latest floating around concerning Harlequins and Death Watch I have no knowledge of which could either mean that this is false information or that no new models will be released.
One project that is more on the horizon is plastic Chaos Cult Troops. I can say that the Plague Marines are more bulky and tailored for the new bases. Standard 5 man squads per box with all weapon options and nice bits to spruce up the Champions.