ok.....
  I'm going to be honest here, so don't take everything I say too harshly. I hate intros that take up even over 15 seconds. If this were to be put in the beginning of a 1:00 minute video, I'd have a heart attack. I feel it's too long. But I understand that the reason why you made it so long was because of the music. A way to make it seem less un-amusing than it already is, is to add some creativity to it. Take a lot of time into this. I suggest learning how to animate legos in blender 3d, make the Earth, Moon, and Sun on LeoCAD (or be cheap and download offline), then re-create that scene you have there, only with 3d, and LEGO. But even doing that still seems.... boring, in my opinion.

Were you thinking of recreating important parts of 2001:  A Space Oddessy in Lego or do a spoof?  Either way, I'm excited!  Though I'm afraid the audience you get that hasn't seen the original will think this is boring or too long and I'm interested to see how you keep their attention.