I think any adaptation that's part of a shared universe needs to adjust the story to fit the needs of that universe. Trying to make the new DC movie universe just a copy of the comics seems like a very bad, uncreative way to approach it. It should define its own identity, its own voice and style. We should hope for its creators to be capable of innovating, not just copying what different creators did. I mean, Zack Snyder made movies that were slavish copies of comics, and his subsequent attempts at original movies were deeply flawed at best.
And it makes no sense to me for the second movie in a series to be done the same way as a story that was part of a well-established history. The different contexts bring different needs.