It looks like Warner Bros. still has no plans regarding future movies with Ben Affleck's Batman or Henry Cavill's Superman. Following the release of Justice League last year, the future of the DC movie universe for Batman and Superman appeared to be in doubt. Prior to the film hitting theaters, it was reported that Affleck was planning on leaving the role, despite still having one more Batman appearance on his contract. Even though it's been over a year since those initial reports came out, there still isn't any concrete information regarding Affleck's DCEU future.
In fact, the same applies to Cavill's Superman. Last month, it was reported that the actor had exited his role as the DCEU's Superman following failed contract negotiations for a cameo in David F. Sandberg's Shazam!, but that was later refuted by Cavill's agent. Still, the news sent shock waves throughout the fandom, and it only exacerbated fears that the current iteration of the shared universe was coming to an end, at least with regards to DC's two flagship characters. While that may not exactly be true, it's possible the people playing the characters may be ready to hang up their capes.
In an article regarding The Flash movie's production delay, Variety re-affirmed previous reports indicating that Ben Affleck and Henry Cavill are on their way out the door as Batman and Superman, respectively. While WB hasn't officially confirmed nor denied either actor leaving their role, they did recently say that no decisions have been made regarding Cavill's future as Superman - and it appears that's still the case for Cavill as well as Affleck. Of course, the situation can change at any time.
It's no secret that Affleck has been contemplating exiting the role as Batman for quite some time; he said as much last year when he talked about finding a "cool way" to segue out of the shared universe. At the time, it was believed that he would be doing that by starring in DC's Flashpoint movie (thus also fulfilling his three-movie contract, which didn't count his cameo role in David Ayer's Suicide Squad), but that film's story itself appears to be moving in a different direction. As for Cavill, he's always been adamant about being in the role for the long haul, but WB wanting to focus on other characters in the meantime, such as Supergirl, means Man of Steel 2 is currently on the (far) backburner.
Even if Affleck and Cavill both officially drop out of their roles as Batman and Superman, respectively, that doesn't mean WB is done with their characters forever. Batman and Superman are cornerstones of not only DC Entertainment as a whole (not just in comics) but of the entire superhero world as well. DC Films may want to focus on other characters in the interim, but those two are far too big to be cast aside permanently. They'll be back, but whether that means with Affleck and Cavill in the title roles remains to be seen. Again, note that nothing official has happened yet, and they both can very well appear in another DC film down the line.