And it was one man's story where he was free to go in the direction he felt best, a story free of any constraints associated with having other character present. We're now talking about a shared universe situation where the studio isn't sure where the balance lies between giving freedom to the individual directors and path for the overall universe. Let's be honest with ourselves, WB hasn't really had a clear idea of where to draw the line or what path they are taking. Marvel does. As long as that vagueness exists then you're going to get films of varying qualities, as has been demonstrated so far in the DCU as well as the X-Men universe.
We can certainly agree on WBs incompetence of handling this universe, thus far. If we can remove that component for the sake of this topic however, what prohibits someone like Reeve from moving forward with a purported planned trilogy while still letting other filmmakers "borrow" his Batman once in a while?
Say WB gives him full reign over the character, what's wrong with him having final say of what can/can't happen to him in something like a JL movie? Same question for Jenkins/WW and so on. An understanding between the creative teams of who controls these characters' fates would help alleviate the confusion in many teams having a hand in these stories.
I think what Marvel have ultimately demonstrated is the value of getting audiences invested into your characters. Yes, you can start with an ensemble and spinoff from there, but with an ensemble you're left with little time for each character to be done real justice too. Yes, Avengers does work on its own, but it works as a popcorn movie first and foremost. It works even better however with the movies that precede it. Would it have done the crazy numbers without the solo films? Most likely not, hell I didn't even think it would reach a billion dollars. The DCEU problem was ultimately putting too much stock into the characters they had, assuming the names alone were enough to do the work for them. The stark reality is as Marvel demonstrated it doesn't matter if your name is Batman or Superman, you still have to do the basics and that's get the audience invested in your characters. Good will gets you so far, and then it gets you Justice League.
The solo titles are where you have the opportunity to give each character their own timely shine. Superhero ensemble flicks are called
team-ups for a reason. GoTG did not require solo titles to popularize absolute nobodies. Groot and Rocket became instant sensations off incredibly limited screentime and dialog. You telling me DC's pop icons would have a harder time gaining traction with similar execution?
In any case it's up to the director/writer to direct their focus where appropriate. The X-trilogy showcased you can always prop up a singular star among a supporting cast even though they're technically a whole. Ideally that wouldn't happen for obvious reasons.
As for the DCUE timeline, I would argue there is no version of the DCEU timeline that would have worked because the structure in place was so poor to begin with. It makes absolutely no logical sense to start with a solo Superman film in MoS, then follow it up with BvS story where the characters had never met before, followed by SS movie that had no baring on anything, followed by a Wonder Woman prequel set a hundred years prior, and finishing off with a team up movie featuring 3 characters and a villain no-one cared about. This is the result of bad planning. I don't even know how to describe the path WB took for this series, it's neither a solo movies or ensemble films path, what it is is a frankenstein's monster of a structure devoid of any direction filled with reactionary decisions. This set of films was doomed the moment MoS 2 become BvS. I don't think there was any way of salvaging this mess.
At the end of the day the DCEU is made up of poorly received films, of course it can't be sustained in the long run.
You string together a handful of great films that audiences simply are entertained by, the universe is slowly built by just
being. Like I said before, MCU's cross-seeds are nothing without the foundations of a competent movie. They're not
that integral to supporting the property collisions. They're ultimately teases and nothing more. You remove them in Phase 1, Avengers still exists as a complete package and it's still communicated to audiences these characters are all in the same playground because....well, they've witnessed 2 hours of just that.
Part of the purpose in follow-ups/sequels is to introduce new information and solidify history (even retroactively). I again will go back to the Timmverse which firmly established Batman's history for a good decade without
anyone from the surrounding DC universe appearing. Until STAS. Within one episode, we understood perfectly fine that the Gotham we've been watching this whole time, has had Metropolis and eventually Superman within the same universe. 10 years after that, we learned of the rest of the League. Without hints prior. Before long we went from street-level crime to intergalactic wars.
Universe expansions don't need to be slowly spoonfed to the people via easter eggs and post-credit scenes. It just works well enough for the MCU because the execution has paid off. But let's not give them more worth than they actually deserve.