Well, to be fair I did give three solid examples of what it looks like literally
True, but not with RPG techniques attached!
However, there are times - eg, in the PbtA games there's a move called 'announce future badness' - where I'm simply describing some new facet and throwing it in the mix. It's generally broad brush stuff, and it will only take form as the players decide if and how to interact. In Apocalypse World it could be a plume of thick, oily smoke on the horizon. Could be a mean, mile-high wall of red dust closing in. Could be a the stench of something long dead and decaying blowing up through the sewers.
In those cases no-one (including me, the MC) knows what it all means. There's no answer until the interaction of the characters in the world and the dice hitting the table forces the creation of an answer. So it can't be said to be related to an existing dramatic need... but it is fuel for the players to ignite something new, or if left alone for me to build a new line of pressure on them.
OK, that's a technique, thanks!
In my BW game, the PCs getting word of the marriage of the Gynarch of Hardby to an established nemesis NPC played a similar sort of role.
To go back to the Star Wars example:
How do we set up (something like) Han being frozen as a possible cost of finding a Jedi Master?
I'm not that good at weaving split party stuff together (but need to get better - it's an important GM technique in Cortex+ Heroic), so when I say what I'm thinking about this it will probably be a bit half-baked.
But what I'm thinking is that first we need to split the "party": Luke goes one way, Han and friends the other. (In Cortex+ Heroic this is a simple GM move, requiring some Doom Pool expenditure).
Then, it needs to be clear that delays or setbacks on Luke's side (faffing around when he meets Yoda; failing the test in the tree; trying rather than doing) escalate the consequences for failure on Han's side. In Cortex+, this can be done mechanically by using the Doom Pool dice that Luke's player is generating in resolution aginst Han's player - but there is no easy way, I think, of revealing this in the ficiton before you do it, because Doom Pool dice just sit there untagged.
But now that I'm thinking about it, one way is to use those Doom Pool dice to establish assets for Vader - Complian Planetary Authorities; Readied Carbon Freezing Plant; etc - which build up the threat against Han, which Luke's player is not able to help against because (in the fiction) Luke is still on Dagobah and so has no means of acting at that distance.
In my next Cortex+ Heroic session I'd already been thinking that I have to run a split party (because one of the players missed the last session and so his PC was not with the other characters, presumably having gone off on his own path). I'm going to have to see if I can do something like the above to generate suspense as to the fate for one group resulting from challenges faced by the other.