Last year we saw, roughly, a six week concept cycle. The Valkyrie(Oct) and the Arrow(Nov.) began the new paradigm of instant-release Concept. 
As of now, that six week cycle is already broken. I suspect we may see something Feb. 14-15, if only to dove tail on the Holiday massacre.  Here's what I got, Hope you like salt.
Feb 15                                     two person ship (small-Medium, tandem play)
Mar 15                                            i know, not six weeks. they had a surprise St. Patty's last year. 
Apr.                                               BIG BENNYS Reliant (playing off April Fools past and Reliant refactor)
May 27-ish, US Labor Day                Work" Ship  Crusader? anniversary of Hercules
June                                                Origin Rover (890J Release)
July                                                     
Aug                                                   Drake Corsair, Anniversary of the Vulture, US Memorial Day
Sept                                                 CNOU Bike  two years since Origin X1 
Oct. mid(CitizenCon)                   Cap/4-digit USD, nothing larger than Corvette, comparable to Pioneer. If Precedence holds, may see additional ship 2-300USD
Nov. Mid(Anniversary),               Pisces(pre-Carrack release), Medium Ship
Dec.                                              Titan Suit (possible based on SQ42 roadmap),
Post-scripting:
Manufacturers that