"I see heads." / "And I see tails." / "It's all a matter of perspective" / "The same coin." / "A different perspective." / "Heads." / "Tails." / "Dead." / "Alive." - R. Lutece. Zootopia was once a much darker place. What happens when the Nick Wilde that is and the Nick Wilde that could have been switch places? Reality hopping shenanigans, that's what.

Knowledge was a key. It unlocked the mind, it freed the spirit. Almost no one knew about life outside the city-state, no one except for those in control. Nick had always lived a life of outcast and discrimination, but as society begins to crumble, he must do what he can to find the answers rarely asked for — and more importantly — to survive in a corrupted world turned against him.

My interpretation of what the original plot structure for Zootopia might have turned out to be had the creators gone through with it.