I guess the only option in terms of war is the Outcasts/CR.
Going to need to obtain permission from Gallia to enter Tau-23 to get to Tau-37 though. KNF is severely weakened by the war, the storyline paints a very sad picture, on top of getting their fleet wrecked;lets say, they had 40-50 BS in 485 to Bretonias 30+, the GRN likely destroyed half of them in the pitched battles of Tau23, then Kogen took 4 of them, leaving anywhere between 10-20 Battleships, half the strength of what is considered also to be very weak; Bretonia.
But I guess there is no war, and numbers will eventually recover and they should surpass/equal current Bretonia in 487, the OC/Corsair fleet numbers are not going to be more than Kusari, so an incursion into Tau37 in order to stem the flow of drugs would be a good idea, it's pretty close to Kyushu anyway. There is also the Sigmas, but I think the Taus will provide more healthy activity/RPjustification.
This is all quite simple to do with just player actions and requires little input from mod developers, this or anything similar could be done tomorrow.
War with Gallia, Bretonia, Rheinland, GMG, etc is out of the question, Liberty I think is way too soon (if KNF partly recover in 487+ and Gallia advances into striking distance of Liberty they could perhaps) and has little mod lore backing.
