Well, the classic way of making a movie is to just sit down and write/make a good movie. You make a movie that you both like and think others will like, even more so the fans of whatever your making. See, roughly, any movie made before 2000.
The new way is to make a message of a movie and worry about what every small group might say or think about everything. Then try to make everything just right to make everyone happy, except the fans.
I think the big Eye Opener for Warner Brothers and DC Movies was Top Gun:Maverick. Pure classic movie. Made tons of money. But then compare to all the DC not so great hits.
And again, this should be so easy for DC. They have a TON of lore and stories and characters to work with.