This is something I’ve been coming up with in extension to my system Hero Factory builds from earlier.
Alongside said builds, I had the idea to do my own version of the Savage Planet lineup from the second half of 2011. With it, I decided to include Evo, Surge, and Breez, as well as change up the animal motifs for most of the heroes. With my version, they are as follows:
Stormer: White Lion
Stringer: Bat
Bulk: Elasmotherium
Furno: Eagle
Surge: Electric Eel
Breez: Axolotl
Nex: Octopus
Evo: Hercules Beetle
Rocka: Golden Jackal
I will have to figure out new tools for them, but in the meantime, I have these prepared in case I decide to do more:

Already, I have some other ideas written down somewhere. Including these:
The above image is a custom helmet I designed for a hypothetical Lucas Valor 3.0. Originally, I was going to do a chameleon for him given his colors, but after sketching out an original “proper” helmet for him, I stumbled upon a happy accident as my WIP looked like a kangaroo, and that’s what I ended up settling upon for him.
The below image is an altered version of Furno 3.0’s helmet designed specifically for Merrick Fortis. In canon, his animal power was not confirmed, but with wings, enhanced vision, and climbing claws as his gear, I figured a woodpecker would be perfect for him.
Finally, I have also thought about doing a hero team based on the villains and vice-versa. Hopefully, I can get them all done.