Things should change in your campaign world. Sometimes in major and unexpected ways.
Having everything outside of the PCs' personal influence be static is an easy default to fall into. The kingdom never changes. The elves always rule the forest. The goblins are always threatening the edges of civilisation from the mountains.
But nothing is forever. Shake things up now and then. Have the king die and plunge the capital into a succession crisis, with the spectre of civil war. The elves retreat from the forest under an onslaught of undead led by a necromancer. The goblins manage to take and hold territory that is vital farmland, leading to a famine.
One way to enable this sort of thing is to draw up a random table of major events, and roll on it once a play session. Then follow the event with logical progressions that slowly change things over time.
Commentary by memnarch (who has not seen the movie)
Hmmmmm. I guess these could be Sand People without the masks and dusty brown clothes. The facial tentacles seem unlikely to fit under the masks we've seen before, though perhaps they're compressible. Or for an even weirder idea, the tentacles grow and get trimmed like hair!
I really wonder which method the GM is using for this scene. Is it a theater of the mind sort of description? A bunch of painted figurines? Or maybe the hand puppets have come back. That'd be extremely silly, but I could definitely see that being the most dramatic for the players.
So. Three more comics until Jim causes a scene and gets them thrown out in spite of the development? That seems likely, but perhaps the other players can rein him in for once.
Transcript
GM: You crest the ridge and spy the Sand People.
Chewbacca: A dull brown ramshackle tent shantytown?
[SFX]: ♪
GM: A vast celebration of thousands, garbed in all hues of the rainbow. Joyous banners and kites flutter in the breeze. Festive coloured smoke rises amidst the dancing throng.
[SFX]: ♪♫
Chewbacca: What happened to them?!
{the heroes go down to mingle with the crowd}
Sand Person: Well met, strangers! We have reclaimed our heritage of artistic philosophy and peace.
[SFX]: ♫♪
Sand Person: We are no longer ashamed to hide our faces. We share with you the true Sand People culture.
[SFX]: ♫
Sand Person: We have thrown off the desert camouflage of unjust oppression inflicted after being tricked into shooting up the Boonta Eve pod race.
Rey: I’ve never seen anything like this.
[SFX]: ♪♫
Finn: Yes, the dancing, the costumes. It’s beautiful!
[SFX]: ♫♪
Rey: I meant one of Jim’s plans turning full circle and resulting in a jubilant cultural renaissance.
Poe: I should help alien societies more often!