That’s a really good point — yes, I believe all BG3 characters and story elements do fall under Wizards of the Coast’s D&D license.
You’re right, making a cinematic add-on or DLC centered on Minthara would likely require explicit approval from WotC.
Still, I think it could be a win–win situation — Larian has shown how deeply they respect D&D lore, and Wizards could benefit from expanding one of their most complex and underexplored characters.
A community petition or an open letter to WotC could actually be an interesting idea. If enough players showed interest, maybe both sides would consider it worth exploring. 💜