I'm shocked I've not seen anyone say Men In Black yet. I keep imagining a bad ass multiball shot through the World's Fair towers and if they can get both will smith and TLJ on board i think that'd be cool.
Maybe a third flipper as a callback to one Starship Troopers maybe? I see people mention a lot how some newer sterns take after some older 90s games so i think it would be really unique, cause as far as i know i don't think any other game has really taken a whole lot from ST. While they're at it maybe take some of the ideas from X Files and stash some aliens behind some of the ramps and maybe have them light to activate modes.