[@Rin] I can see it being a hard sell based on how some people want creativity and how others will want to mix with the other players in certain ways.

As a thought, you could use reincarnation as a basis with alternate dimensions. Somehow there was a world fracture and everyone from different time and dimensional periods wound up in the same world. They all look the same-ish and you the gm are the original who is trying to control them and such while they all play up. Just a thought.

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Have any of you seen Redline?
[YouTube=https://youtu.be/Y4y8ph3cH54]https://youtu.be/Y4y8ph3cH54[/YouTube]

It's basically a Fast and Furious x Star Wars Pod Racing with weapons.

So here's my thought. The role players create a vehicle and fill out some stats like speed, armour, cornering, etc under a number system like Fallouts Special system. The RP is played out as a race but the stats will help guide you so that you know a speed of 8 won't be faster than a 10 but a cornering of 10 will be better than a 6.

My concern is how would you keep something like this balanced, how would you choose a "winner" and would people be willing to stick around for such a different style of role play? It's one that I pretty much know exactly what I want in the design and structure but I've never had the time nor confidence to Gm such an event.