So arc one is about the first animals in the lab tested on and created (feral, Melvin, scythe, sinster, flare, brace, grinny and wrath-maybe more.) and how they all fear venom (professor Steve venom, the head scientist at the lab.) they all are slow to meet and now have to stick together due to all the pain and suffering done by the testing. Some animals die often and die brutally. Arc one is based on how the animals interact and stick together through the pain and all.

Feel free to ask about the characters because each one is special to the timeline and are unique in appearance and in abilities.

I might edit this and add more.