This question already has an answer here:
Around 2000 or 2001 there was a cartoon I used to watch and I can't remember the name of. Here's what I remember:
- The setting was post-apocalyptic but there was still high-technology, just a lot fewer people.
- The main character was a young man, typical "good guy looking for answers about the past", but at the point I stopped watching he was turning "evil" due to some sort of nanotech infection. He basically fell into a grey goo river.
- I seem to recall a rivalry between the hero's father and some other guy, reminiscent of the rivalry between Superman's dad and General Zod.
- The nanotech in that cartoon wasn't identified as nanotech. It looked a lot like the Inque character from Batman Beyond.
The art style was rather minimalist, the character design was a bit "geometric", think "Clone Wars".
Finally, I used to watch this on French TV, which means it may actually have been produced before 2000.
Any idea what this might be?