Ketron seems to be listed for Musikmesse now. I've got the impression most exhibitors are a bit slow this time as Musikmesse is very early this year, quite shortly after NAMM.
And they will probably be pushing the new stuff on their website at the same time...
The drake engine is indeed a mix of samples and virtualisation technollogy and effects section .... Its an advanced answer to sa, dnc with rolands super natural technollogy comming close..
Tough my source of previous GEM engineering says their algorythms are much deeper, and technollogy is finally fast enough to let it bloom... There is a full synthesizer section that allows incredible freedom to edit the sounds...