I think a Final Fantasy one would outsell a Pokemon or a SSB one.

I'm sure all 3 would sell well, though I personally wouldn't go near a Pokemon one. It just doesn't feel like the right franchise to me.

I hope they wait for the Nintendo home console Warrior's spinoff to come out on the next hardware.
HW has enough gameplay to last the whole generation. Then release HW2 as a launch title

If they want to make a 3DS or New3DS spinoff, then by all means do so.
Pokemon Warriors game for 3DS, that could sell.

I can hardly see Pokemon or Smash fit in a Dynasty Warriors formula (most importantly, no real Mooks to fill the armies in any of both games), si I don't think they would work out.

A Fire Emblem however would be a serious contender for such a Spinoff, and one I would possibly buy day one.

And in a totally different art style, how about a Paper Mario Dynasty Warriors Spinoff?

I listened to an IGN podcast where they had a pretty good idea. Base it off the great Pokemon War that a backstory in X and Y. Where you control Pokemon to take out other pokemon. (Using the normal trash Pokemon as the fodder. i.e. Bug types) And have it strutured like the Pokemon Conquest game.

SSB definitely fits well imo. One could argue pre 1998 that a fighter with Nintendo characters wouldn't work. (Mario jumps on enemies/Fox is a pilot/etc!)

Imagine a Pokemon Mosou... o.O

What is OP, if you don't mind me asking? I haven't heard of that abbreviation.

I would buy all three of those.  I need least a musou game a year for my fix.

The abbreviation usally stands for Over Powered.

Definitley Fire Emblem Warriors and Dreamland Warriors.