User blog:KnucklesFanGremlin/Fanfiction idea sort of?

Well, I'm trying to make a good OC based fanfiction that's not super complicated, but whenever I do it starts to become complicated. But while I was in the shower, I came up with another idea that could possibly work out like an actual Sonic game. I'm going to try to make it similar to the Sonic Advance series (with some slight Sonic Rush vibes), so here's the basic plot idea:

Tails, Knuckles, and Amy are all kidnapped by their Metal counterparts: Metal Knux, Metal Amy, and Metal Tails (which is an upgraded version of the Tails Doll). However, the only one who wasn't captured by his robot twin was Sonic, and he sets out to save the other three. But since this is OC based, he literally crashes into River early on in the story, and for some reason she decides to go along with him.

It sounds pretty simple, but I don't know if anyone other than me likes the idea. Should I add and/or remove something, or should I just start writing with what I've got?