What should the third movement be like?

So, I've been working on this sonata for 5 months and i got to the point where i was stuck and could not think of anything for the third movement. Should the third movement be a fast agitated movement or a slow-paced one? What motif should I modify and use from the 1st and 2nd movement for 3rd? Feedback and suggestion would be much appreciated.   

Is this intended for human playback? Some parts are; I think, nearly impossible (superfast, wide chords, octaves....). The part in Mov. I that comes from m. 47 doesn't fit very well, it's like a pop ballad in the middle of chromatic and contemporary style.

I like more the second movement, it has more contrast of textures. What I don't see is the parts that, suddenly become totally tonal.

I feel it's complete. But if I had to expand it, I would write a slow movement.

3 hours ago, Luis Hernández said:

Is this intended for human playback? Some parts are; I think, nearly impossible (superfast, wide chords, octaves....). The part in Mov. I that comes from m. 47 doesn't fit very well, it's like a pop ballad in the middle of chromatic and contemporary style.

I like more the second movement, it has more contrast of textures. What I don't see is the parts that, suddenly become totally tonal.

I feel it's complete. But if I had to expand it, I would write a slow movement.

 

Yeah! Thats what I thought when I made the superfast widechords bit, like "Is it possible to play?" Maybe i need to tone down the intensity on that one or make it still intense but less hard.

For the pop ballad bit, i was experimenting to combine modern pop ballad in the middle of these storming chromatic style to give somekind of a breather.

And also, 2nd movement is less intense than the 1st one, so maybe the 3rd movement should be less intense than the 2d one.

@TCGCoolio

Yes, I think there are long parts with quick 16ths or even 32nds that are impossible, it happens the same with some chords and arpeggios.

But you can write for MIDI software, not for human, take a look at Conlon Nancarrow

Inserting such different parte (regarding the "pop" one) is possible and not bad.... But you need to make a convincing transition from where you were to the new sound. Otherwise, the listener can think you're music is wrong.