If Legend of Zelda:TP was easily playable on the Wii with the Wii remote, the Dynasty Warriors franchise of games controlled with the Wii remote wouldn't be taht far fetched.
Now I'm not sure how much of the gameplay and controller mechanics of the game has changed since DW2/3/4 on the PS2, but if the character controls for DW6 are near identical to the old DW games it can be easily adapted to the Wii remote. I can see myself using the Wii remote gestures for the 'Hidden Skills' in LoZ:TP on Dynasty Warrior characters.
KOEI could probably incorporate the nunchuk to control the offhand weapon independent from the mainhand on characters that utilize 2 weapons. That'd be something new that was never in any of the previous Dynasty Warriors games. And also, if they wanted to, they could make the swordplay more freeform and instead of preset gesture attacks like it is in LoZ:TP and Redsteel. Have the main character on screen react in real time to the motions of the Wii remote. When you thrust the Wii remote, the character would thrust as well (could be in 1st person or in 3rd person), and when you time it right, you could actually parry or block a blow with the movement of the nunchuk. Adding special attacks and combos could be difficult, but they can execute those well if they incorporate some gesture recognition. The weapons would still move according to your free form hand movements but trigger the special attack or combo if the game recognized some preset movements or movements close to it. Similar to how in Trauma center, if you motioned a star symbol with the Wii remote, it would activate slow motion mode.
Heh, that's all I can think of at the moment.
I could really dig a Dynasty Warriors game on the Wii, but they'd really need to make full use of the Wii remote to make it new and refreshing to break from old tedious button mashing of their PS2 days. Sure, I had a choice of 12 characters at start and unlock like 20? additional characters with different weapons and attacks but each character lacked individual variety during the long campaigns and using mostly 2 sets of button combos throughout the whole game started to get dull halfway through.
But still, I loved Dynasty Warriors, it was the very first game where I was one guy in an epic war slugging it out against massive hordes of opposing armies.
Oh, I kind of got off track from your question, but, no, I haven't heard any news of KOEI bringing the Dynasty Warrior franchise to the Wii.
GUAN YU MUSOU MODE!!