Make a movie like Hairspray, Dreamgirls or Chicago, or even High School Musical, and people will go.
It isn't that the entire genre has returned, and the general public is ready to swallow all musicals.
They need to have what any other movie that is popular today needs to have:
Big established stars or young cute unknowns
A fun or (semi) clever, fast-paced story
Big stars
Big young stars
A story that's easy to understand and follow
Jokes
Lots of energy
More big sexy stars
And because it's a musical... Catchy, fun, "cool" tunes. And impressive singing and dancing.
The target audience still needs to be 18-35. Just like it does for any other movie.
Don't make the audience think too hard. Don't challenge them with far-fetched symbolic "cinematic concepts." Don't slow down the plot for ANY song, EVER. Don't offend them with too much (gay) camp, but make sure they laugh enough.
Don't ask them to remember anything from the movie for longer than two minutes.
Make sure everyone in it is VERY appealing.
Follow these (not-so-simple) rules, don't break any of them, and you too can have a musical hit.
If you're planning a movie musical that doesn't fit into these handy molds, then good luck. You're looking at a "niche" audience at best. Or an "art film." Or a big giant flop, at worst.
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22