The problem that you have is that an idea is just an idea without the work that it takes to turn it into something that someone is willing to pay money for.
Don't forget that there are still many big selling IP's of the past that are being left to collect dust, because people aren't willing to pay for something that they think they could do better themselves.
Interestingly enough, I was thinking about an IP for a game that was in pre-production for PS2 at a studio that I used to work for, and how excited they were about it at the time. Since then, nothing close to that idea has been released, and while I'm sure that they tried to sell the IP to numerous other places, it seems as though no-one has been willing to take the plunge.
And this was an idea that had been worked on by professional devs for a reasonable amount of time.
Realistically, if I was in your position, I'd get together with a group of other people and try and prototype your idea with a view to taking it to publishers as a demo rather than an idea on paper.
If you can show someone practically that your idea works, then people are more likely to pay attention. If you just show them an idea on paper, they'll probably just remember the best bits and tell you they're not interested.
If you can try and think of a low cost way to come up with a working prototype, maybe even if you just do it yourself in Flash, then you're more likely to convince people to start spending money.