Just appeared on one of the usual Asian sites, is what looks to be a new Megatron toy, but with a new alt-mode. It is a tank, but with wings, so almost a transitional form between the two existing modes he has in the Movie Universe.
It is also said to be Voyager size, but I think it looks bigger.

http://www.tf08.net/forum/viewtopic.php?f=9&t=438

A bit of a weird colour too, but the vehicle mode doesn't look too bad.