That idea has been done lots of times, sorry. I have faith that Joe Brsomething will come up with something different.
Honestly, a lot of the eps have been about the parents with the kids. There hasn't been just a Bluey with her friends ep. Even Bingo gets more focus than Bluey sometimes.
I want to see Snickers again. And Pom. And a Rusty.
Though, yeah, I want to see more of Lucky's Dad acting dopey, haha.
I can imagine the Hollywood ized movie being them having an adventure during a vacation.
Something I'd like to see is a callback to all the super abilities Bluey and Bingo made before (heavy or light featherwand. Asparagus animal transfomer. Freeze xylophone. Dance mode. The puppet control Magic. Etc)
They already had a wedding. Maybe the big family event is Uncle Rad and Frisky are the ones having a baby?