Over the last 18 months, it's been a turbulent ride at The CW. Fans have seen most of the Arrowverse come to an end, leaving many counting down the days until Superman & Lois would be given the axe. That time has come, breaking the hearts of DCTV fans who no longer have HBO Max's Titans and Doom Patrol to boot.
Source：https://www.cbr.com/superman-and-lois-season-4-final-season-pitfalls/
