They couldn't do it anyway. They've had since 2013 (and quite a few expensive, high-profile movies) to nail it down. I think it was all doomed from the word go...
Man of Steel was a tough sit. I remember walking out to the parking lot afterwards and hearing everyone around me kinda ragging on it, confirming that my initial impression - a miscast, point-missing joyless slog from frame one - was dead on.
That Kevin Smith story about Jon Peters rings so true now (and he was a producer on
MoS, so I know he had to be squarely behind some of the idiocy that made it on screen...including those vaguely spider-ish terraforming(?) machines).
"There needs to be a giant spider in the third act...".
That they tried to use that as the jump-off point for their Marvel-style "let's put a team together" efforts...yikes.
"Guys, please don't anchor anything on this barely-watchable movie...take your time, re-think some stuff...".
Nope. They went and did just that, building off
Man of Steel. Nine years - and two Batmen, three Jokers - later, it's about as goofed-up and disjointed of a franchise as I've ever seen.
Nothing works...
A shame. All the potential and pieces were there.