Silver the Hedgehog ( What I'd think would be interesting)

The future is destroyed. All hope is lost. But a simple hedgehog with mysterious powers with his best friend who can make flames save the world by going back in time. But as a result his best friend died to save this future. But as she died a new timeline was created one where this disaster never happened one where the disaster was prevented thanks to both the hedgehog and his best friend. But what happens when he finds out about the original timeline. The one before the new one.