Why do you think it look like a turkey?
It could maybe be forgiven if it was building toward something more. But the fact that everybody knows the book is closed on this movie verse, it will only draw the most ardent of hardcore fans.
Your reasoning doesn't really make much sense. Chris Nolan announced the Batman reboot a year before The Dark Knight Rises released, which made a billion dollars. The general audience doesn’t know or care about that stuff. All they want is an entertaining movie and nothing more. Especially, children who love superhero movies. Do you honestly believe five year olds who saw the trailer play in front of Endgame knows about what goes on behind the scenes of the film?
I disagree. I think MCU changed all that. People want the next chapter in their superhero super story now. I don't think people are capable of enjoying single films any longer. An entire generation of kids is being raised to expect nothing less. I was talking with some young kids the other day annoyed that the Friday the 13th series wasn't very good. I explained to them that they used to just crank out shitty sequels to make money and nobody cared about ongoing stories and they didn't even know what I was talking about.
Part of the marketing of TDKR was the epic conclusion of the trilogy. It wasn't released as just another Batman adventure.
Movies like that have existed for decades. The original Star Wars trilogy, Lord of The Rings, and the Harry Potter series. It’s not even new to superhero films with the Sam Raimi Spider-Man films having an overarching storyline with Harry Osborne.
Dark Phoenix has also started some similar marketing.
Chris Nolan announced the Batman reboot a year before The Dark Knight Rises released, which made a billion dollars.
think it was just the Superman reboot that was announced in 2010/11 before TDKR was released,.. there was even talk of Bale reprising his role as batman in the very early stages of BvS (2014ish)