You know it wasn't that bad, I'm even gonna go check out your other ones when I get some time.
Good Points:
Story - You seemed to have thought a decent story, and had a script not just saying whatever comes to mind.
Figures - The figures appeared to be in great shape. I've seen some little mini-movies done like yours and they use the poorest excuse for a figure I've seen.
Voices - This is under good and bad. For the good I liked the way you were using different voices, spicing it up, and your Batman really does sound pretty close.
You can also tell it means a lot to ya, you took pride in it, it's nice when directors/producers/actors whatever, really seem commited to the project they're working on. I'd like to see you keep making stuff.
Bad Points:
Voices - Superman and Punisher were too close, also with The Joker you weren't into it enough. I bet when you were playing the voice, you felt weird doing it. Like if someone walked in on you during a scene, you'd feel dumb or something. You can't think like that, just from Batman and parts of Joker I can tell you could do a great job. You gotta really be the characters! Use different tones and pitches, it just felt like you were reading a speech, use feelings and emotions.
Various Stuff - I would just work on the script to put more feeling into it. I know it's meant to be simple, and that makes it great. However try to use some different techniques next time. Such as: camara angles, finding ways to hold the figures up without your hand, seeing your hand takes me outta of the story a bit. Also makes some simple cardboard sets, use a paint for backgrounds and specials effects ie: blood.
Overall nice job, keep working on them. Remember you'll only get better the more you try.