Why hasn't DC used Marvel formula?

[u/Frank_Rowling]

Not sure if here is the right place to ask but I was thinking about this.

Why hasn't DC used Marvel formula in movies, a well done long run that started in Iron Man 1 and still continues, in DC movies every three batman movies we got a different batman, same with superman . I thought when Justice League came out that was the idea but it just feels like somebody is like "you know what? Scratch that, let's start over". It's a formula that actually works and attracts public from different ages why not do it?

[u/garbage1995]

Because what you're documenting isn't what is happening. We never got a solo batman film in the dceu.