Out Today 7/17/24: WB Home Entertainment

Get it here.
Now fully revealed as the ultimate threat to existence, the ANTI-MONITOR wages an unrelenting attack on the surviving Earths that struggle for survival in a pocket universe. One-by-one, these worlds and all their inhabitants are vaporized! On the planets that remain, even time itself is shattered and heroes from the past join the Justice League and their rag-tag allies against the epitome of evil. But as they make their last stand, will the sacrifice of the superheroes be enough to save us all?
"There are also other characters that come and go (also owned by the Warner Bros. Discovery conglomerate media company)."
Huh. Is that just referring to other characters from the show itself, or is this implying that the new season is going to have cameos from other WBD IPs