I could see her being a part of the Zendikar restoration story, except Nissa pretty much already occupies the narrative position that she would fit into. In fact, the biggest problem I see with her is that her backstory and color alignment is fairly close to Nissa's. She's just more creature-focused instead of leyline-focused.
Maybe she could be involved in the next Theros storyline? there's nothing so far to connect Nissa to Theros, and a green walker could have some room to expand there.
Gonna bring this back. Honestly, I hate this character lol lame back story, looks lame, the ‘essence of creatures’ also feels dumb...so idk to me it sounds and looks like the OC of a 13 year old. It’s no different from Nissa who also wants to restore her world or whatever. Not a fan of the name either.
To answer the question, she could show up anywhere because she’s that generic, they even added her traveling the multiverse so they could squeeze her in anywhere.