Whizbang Dustyboots
Gnometown Hero
There can still be plenty of fights even if the slavers' backs have been broken. There are dragon kings, unrepentant defilers doubling down on sucking the planet dry, wars caused the fight over increasingly scarce resources, natural hazards, etc.Dying world, polluted by magic, heavy reliance on psionics, species outside the norm of high fantasy D&D, focus on survival. Yeah it can do that, and be extraordinarily relevant to pop culture and the modern world rebuilding after a pandemic. It's IMO the BEST setting for these times.
Yes, there would be the end of slavery. Talk about it. Update the social hierarchy. Freedom fighters can be heroes. Focus on a part of the world where they've already won the fight.
There's so much that can be done.
That said, if WotC doesn't want to do it, someone else should jump in and make their own climate change + psionics swords and sandals setting.