Now of course this is all hypothetical, but ever since the movie JOKER broke a billion there's been rumors of a sequel, and Phillips and Phoenix aren't exactly against the idea. And now there's The Batman. Even long before yesterday's trailer got the movie trending people have suggested that these two takes on Batman and Joker should crossover, and now after The Batman trailer I'm reading that wish even more.
Of course there's the other possibility, that if there are any JOKER sequels (and that's a big IF) they'll cast and develop their own Batman. And The Batman trilogy will have it's own Joker.
There's advantages to both. The JOKER movie is an award winning critical darling popular billion dollar phenomenon, and the hype for The Batman is already palpable. A crossover would get people interested. On the other hand, if the two takes are kept secret, you will get a lot of people curious how The Batman's Joker compares to JOKER's Joker and how JOKER's Batman compares to The Batman's Batman. From a marketing strategy standpoint both are enticing ideas.
So for fun and debate, let's say that Phoenix's Joker does return to take on Batman, and Pattinson's Batman goes up against the Joker in his trilogy, should the two crossover to face off, or should they each stay separate and get their own respective versions of their archnemesis?