@james kind of question and suggestion at the same time.
Have you considered adding world-exclusive creatures in the future?
Right now we have the same creatures over all planets, the only exclusive thing is their elemental variants, but what about fully exclusive creatures?
Toxic/corrosive worlds could have some sort of slimes, and plant based creatures.
Found on reddit here
This one is from metroid prime
This one is from one piece
For Burnt worlds maybe fire spirits?
From paper mario
Again from metroid prime
Well I guess you get the idea, so I would like to know if this is or can be considered for the future