tl;dr.
What are you bringing to the table? You'll need one or more of;
- Experience in the business side of gaming -- contacts with publishers and so on, with involvement in a couple of titles.
- Experience as lead developer on a games project.
- Several million dollars.
This, very much this.
I was trying to get funding for a simple 3D platformer, and there was evidence that people wanted it. But investors wanted me to kit out a "lite version", spend money on a landing page and maybe they would fund me (or not). I felt like I was chasing rainbows most of the time, so I decided to focus on something which can be done using only free royalty-free assets.
Had I not chased investors all this time, I would've released several short but great games and been able to convince investors that I'm serious by pointing to my track record.
Still, wouldn't hurt to try to get team members on board for a revenue share. Even though I couldn't get an artist on board, I did manage to get a professional music composer/sound designer on my team. :)
The truth of the matter is that I struggled with a simple collect-em-all platformer which didn't rely on servers. Your idea is a lot more complex and difficult to do right.
So I'd suggest to play to your strengths for your first game, and try to find someone who shares your vision. If you don't know or don't have a particular development task you're great at (i.e. you're just an idea guy), then I would suggest joining a mod team as a generalist and find one thing you can master (I can point to one mod team I'm on who is serious and definitely needs more people on board at this moment).
Then, apply that to your first game. Once you have a track record, you have a higher chance of convincing talented people and investors to contribute to your game. Otherwise, most of the time, it is chasing rainbows.
Trust me, OP, I've been through it and unnecessarily spent years chasing investors because I was a dreamer and not a do-er. It's too late for me to get back the lost time, but I hope that my experiences would be helpful to you. :)