I don't want another movie. I'm a big fan of Once Upon a Time, and I would LOVE for JHC to lease the property over to them. With Rumple disappearing, there's ANOTHER stealer of children with a smart mouth that could easily take up the slack.
Regardless of what people think about Return to Labyrinth, I find the world fascinating and worth exploring. It may have been rushed and clunky, but Mizumi is on par with Regina from Once. All I could do when watching the episode where Prince Charming deals with the Siren was just how much she looks like Mizumi.
And Uncle Matt had a cameo. That was built-in awesome.
I would rather see a series that develops the world. It's not like Dark Crystal, where we have a mythology, etc ... Labyrinth is just kinda there. I choose to view the movie not as a poorly done thing, but a metaphor for how Sarah treated her world, like a set with characters who don't exist after the curtains close. However, like Jareth sings, he wanted to live outside of her limited imagination.