SM3 is starting to resemble the planned, but sadly shelved, Batman Triumphant movie from Warner Bros back in the late 90s/early 00s.
The idea was to bring back a lot of villains and other characters from the movie series, Jack Nicholson's Joker, Danny DeVito's Penguin, Michelle Pfeiffer's Catwoman, Jim Carrey, etc etc. Have everyone face-off against the Bat in a final dream sequence showdown.
Bringing back all those actors would have shot the budget into the stratosphere, which is why the project was eventually abandoned among other issues. We the movie-goers lost what could have been a great finale.
Though entirely different, this SM movie is giving off the same vibes that WB failed to deliver.
Don't disappoint, Sony/Marvel.