Major potential, but could use SERIOUS work
I think you have a great vision of what you wanted this movie to be, man. I think it has imagination. The small details like the variation in the city and all the people and flying objects; that part I really like. The designs in mind for the characters were good, and the storyline, if nothing else, kept my attention. The problem here is that the only thing that was executed right was the ideas.
-Visuals-
You say it's your third flash, so I'll judge accordingly. First off, you could really stand to learn frame-by-frame. The tweening on the characters made them look like marionettes the whole time, and there was this constant side-profile shot going the whole time that really wears on you (especially that excruciating scene where Omega follows Trask. That was just brutally long and mundane unless you were just looking at the variation in the background...) I have to tell you that variation in key in animating, you gotta change things up if you want to be able to keep people's attention. I suggest you simplify your character designs while you're still new and work on drawing out a new shot every 8-16 seconds so it doesn't look so ameteur. Also, please NEVER use the default gradients that come with a newly opened file like the "shitty chrome" or the "bleached donut black-white radial".
-Sound-
OUCH. MY EARS. I used to struggle from a problem very similar to this where I didn't know to work with another program besides Flash for sound. This is a necessity I'm afraid. That scene at the fight club could have easily wrecked my speakers with the horribly crusty cheering, you have to watch that. I suggest going to Google right now, typing in "Audacity Download" (It's free, a small file, and legal) and learning how to make your sound volumes consistent, and don't EVER export flash without optimizing sound. You really have to work on that, you'd be surprised how it'll turn people off.
-Overall-
You've got me intrigued with the series, and I will be checking out everything Omega that comes through the portal in the future. But try watching some professional cartoons (You seem like an anime guy, check out the composition of your favorite cartoon), and practice, practice hard! I commend you for making a movie of this length, not many people are willing to do that, but keep in mind also that the quality has to be at balance with the quantity. Don't ever re-use character symbols for every shot just so that your movie can be 10 minutes long, it's not worth it. People wont want to rewatch it and neither will you. Wow, damn, you caught me on a tangent. But I'm always intrigued to see a new action series on NG, that genre of flash is dying, Kudos! Keep working, I'll keep watching.