Well, only 2 numbers of sets are missing (243 and 244). I understand that it will be used for French and British artillery sets.
If the new releases are driven by the numbered list then it does look like only two slots remain for this WoSS range. However, I'm not sure why additional sets cannot be added without sequential numbering, to the end of the complete product list?
One generic artillery set might well cover most needs for the WoSS, since artillery uniforms are similar for western European armies. Obviously two artillery sets does offer potential for additional crew poses, and also for different guns. If there are to be two artillery sets for this WoSS range, then I sincerely hope that Strelets don't put the same gun in with each set. This notes also of course that two very good early 18th century artillery sets are made by another Russian producer.
Absence of a French Line cavalry set in the WoSS series when four different Maison du Roi cavalry sets have been included would be a strange production decision to say the least, should this prove to be the case. A French Napoleonic comparison would be, say, producing four different sets of Imperial Guard infantry but no Line or Light infantry at all.