Didn't want to start a new thread, but HBO has announced a third streaming service: HBO Max.
HBO Max is coming out in Spring of 2020. This is a partnership between HBO and WarnerMedia.
HBO Max has earned the exclusive rights to air all the episodes of Friends, Fresh Prince of Bel Air and is also the exclusive streaming provider for all of the CW DC programs (Arrow, Flash, Batwoman, Legends of Tomorrow, Riverdale, and Katy Keene).
There will also be exclusive movies produced by Greg Berlanti (creator behind the Arrowverse) and also Reese Witherspoon.
It was also just announced that Season 2 of Doom Patrol will also air on HBO Max (Season 1 was a DC Universe exclusive).
This package is separate from HBO Now & HBO Go.
https://www.hbo.com/hbo-news/hbo-max-streaming-service