While it met with poor ratings, Dynasty proved lucrative thanks to the Netflix output deal and international syndication which earned CBS Studios millions of dollars per episode. Selling CW series like Dynasty to Netflix and overseas markets was so profitable for Warner and CBS that the network almost stopped cancelling shows, and expanded its broadcast schedule. On February 14, 2018, The CW announced that it would add a 2-hour primetime block on Sunday nights beginning in the fourth quarter of 2018, returning the network to Sundays for the first time since the lease to Media Rights Capital ended in 2009, as well as expanding The CW's primetime slate from 10 hours a week to 12. Discussions with CBS and Warner Bros. about the expansion began as early as July 2017; both gave their approval to the move that December, with the network reaching clearance deals with key affiliate partners in early 2018. On June 12, 2018, AT&T received antitrust approval to acquire Warner Bros. parent Time Warner, with the acquisition closing two days later. Time Warner was renamed WarnerMedia and AT&T became a co-owner of The CW with CBS. The CW debuted reboots of Charmed, Roswell, and Originals spin-off Legacies during the 2018–19 season. Despite modest ratings, their renewals – along with the renewal of the entire 2018–19 lineup (absent those series already previously announced as ending) – reflected their value to the network's founding co-owners CBS and Warner Bros., which received the windfall of selling them to Netflix and international buyers. This strategy continued with the 2019–20 season debuts of the new Arrowverse series Batwoman, Riverdale spin-off Katy Keene, and Nancy Drew. On August 13, 2019, CBS and Viacom officially announced their intention to re-merge, with the combined company to be named ViacomCBS. The merger was completed on December 4, 2019, making them officially with AT&T's WarnerMedia co-owners of The CW. 2019–2022: Streaming era deals Warners and CBS did not renew CW's Netflix deal in 2019, intending to use their shows on the network for their own streaming services. International sales also mostly ended, because both companies wanted to retain rights to their own shows to compete with Netflix outside the United States. WarnerMedia's HBO Max streaming service subsequently acquired exclusive streaming rights to Warner Bros.-produced CW shows. This began with the 2019–20 season, with the Warner Bros.-produced Batwoman and Katy Keene debuting on HBO Max after their current