Originally Posted by
Last Son of Krypton
Starting over would be too late now because the DCEU has to catch up with Marvel as you say, and can't effort spending years to reintroduce "for the first time" each characters to build up a shared universe from scratch. I'm sure WB would prefer waiting to start over if there was no other company being already ahead of them, but it's not the case.
About dynamics... it's only SM that got the short end of the stick in the development of the shared universe. First under Snyder and, now, it seems the trend will keep going.