How DC Can Craft The PERFECT Shared Universe On HBO Max
1. And, Finally, DO NOT Connect To The Movies Or CW
Why risk it?
If the HBO shows connect to the DCEU movies then they will be forced to navigate its mess of a timeline and likely not be able to use characters like Wonder Woman or Batman, meaning that the new shows would probably quickly meet a similar fate to Marvel's Netflix series.
If they connect to the CW stuff then a lack of access to characters could again be an issue, plus the budgets would be so disparate that having characters meet would only further cheapen the Arrowverse.
The only instance in which there should be any crossover whatsoever is if there were a massive budget multiversal Crisis movie, not one of the CW's yearly crossovers, but an Avengers-level funded movie.
DC has a real opportunity to craft something brilliant on HBO, it shouldn't let the promise of slightly higher viewing numbers once a year interfere with that.