Well, I decided just now to watch this, and I have to agree with JK. This wasn't bad at all.
Sure, the animation was choppy, but it has style. While watching it I didn't care how low the framerate was, I was actually fascinated by how some animation tricks worked so well (like the dressing part, or the pedals, or even the explosion). It worked really well. And the plot sounds like part of something bigger, it makes me curious, it looks well developed and way more complicated than the average batman brickfilm we usually find on youtube.
Sets were another impressive part of this movie, very realistic, and definitely gave the impression of being in a real lego world (even if some times I spotted the end of the set, didn't care about it).
I don't see why Anteater gave story a 3/10 rating, and lighting wasn't that bad either. I find the solution to your lighting problems interesting: it is impossible to make a real Batman sign on the sky, but you managed to make it look real, no matter how it was clearly printed in the blanket or whatever that thing was, it looked real enough to me.
The sound at times was not realistic, and I could hear you used only one sound track, which leads me to the question: do you use WMM? If so, I'd suggest changing editing software. You'll see having more tracks will help, you won't have to stop a sound effect to put in a dialogue. On another note, the voice acting was good and convincing.
Also, another aspect of the movie that helped the animation look good was the cinematography. It was excellent in some parts, and interesting. In some parts it felt like a real movie (although sound didn't help much in that). Well, I'm not going to say it's one of the best I've seen in brickfilms, but it's good enough to me to say that it's better than in most of the brickfilms I see nowdays.
And actually I think the animation here is way more fashinating than the usual "good 15 fps standard" animation. It's fashinating because even at a slower framerate it really works, to the point that I don't care how theorically bad or unrealistic it should be considered, kinda like Through the Hatch, which is one of my favourite brickfilms, that has choppy-looking animation (it's great choppy-looking animation).
I'll probably the only one here to say that the animation here is absolutely perfect and flawless, as in the previously mentioned film, because I refuse to think the animation is choppy/too slow.
But well, that's just my opinion. I can't wait to see the second part.
Congratulation on making this, you definitely deserve to win something for that contest. 4/5