Nunchucks remind me of how horrible weapons were for Monks in FF1. Cost/benefit of adding Nunchucks isn't very good, IMO.

The Kusarigama Chain-Sickle sounds neat, but probably has the same chance as whip, sadly, due to needing new animations.

I'm ambivalent on Gunblades; they somewhat fit the Corsair job (and wouldn't be terrible on Ranger), so I wouldn't mind seeing them in game. The whole bullets causing the blades to vibrate or release extra power on hits fits existing game mechanics of Virtue and Magnus stones. The melee aspect of the ranged jobs, when staying out of range isn't possible, would be nicely enhanced with this game mechanic, and they're already used to using ammo to enhance their damage.

Weapons I would like, but I am not expecting:
Fans: Shield-weapons for Dancer - could just be a new dagger type with +parry, augmenting defense dances etc.
Ninja Stars: (Yuffie) These are huge, windmill-style, returning shuriken. (one should be called the Death Star - you know SE loves Star Wars)

My list of anticipated potential weapon types would be:
#1 want (I'd be really happy if we only got this one added): Dual-ended Sword-Blade polearms
Zidane-FF9, Judge Gabranth-FF12, If not a new skill for "Glaives", it could be implemented as new graphic style of polearm for Dragoon, Thief and Samurai (yes, this would mean giving Thief polearm skill, but only having access to a few in this new style of polearm)
* I'd expect 2 variations: Glaives (Drg,Sam) and Swallows (Drg,Sam,Thf)
* Polearm animations and weaponskills already work for the Glaive graphically as well (no extra work).
Dice: (Setzer) For a unique thrown weapon Corsairs can use. (Certainly not a new skill category, just a variation)
Whips: (Rydia) Ranged weapon, lots of added effects for Beastmaster, Summoner, Dancer