I was simply doing a batman vs spiderman test some time ago but just never got the time to get around to completing the animation. Maybe one day I will do it but well we will see. Since I am not sure about that possibility here is the Work in progress that was the animatic before the work gets turned into a working piece. The music was just a test sampler of old batman cartoon and mask of the phantasm along with the theme from spiderman.
I think you need to work some more in your timing and composition. Some shots were pretty slow for a fight scene, and others need improve in clarity / readability and focus. Having your characters drawn red and black helps identifying them, but still some of the shots were a little confusing or could be improved.
In any case, some of the shots are also visual candy, keep drawing those.
PD: Batman looks kind thing to me, but that's up to you as "art director".
Thanks for you comment dude but this is an animatic. An animatic is a moving storyboard hence why you may think the pacing is slow. It's also to convey where and if I should or should not increase the pacing for a shot more so for visual reference but thank you anyway for taking the time to watch and provide your feedback. Unfortunately this project was shelved and the full production will not happen.
2 things
1) You need to complete this as it is going to be awesome!
2) Why did you file it in as Mature? -- I saw nothing indicating it was gory, nude, lude or crude.
Actually I did not even notice I filed it as mature.. I have to fix that. But thanks for you comment.