The planned crossovers between Batwoman and Superman & Lois will not happen. The latter will have a special premiere episode, which also means the delay of the first episode of the seventh season of The Flash (2014). The CW had an Arrowverse crossover planned between
Batwoman and
Superman & Lois. Next to that, characters from
Black Lightning or
Supergirl would also appear in other series. That's not going to happen during this season. Due to the corona countermeasures, it's impossible and unwise to exchange cast members.
Fans of
The Flash (2014) will also have to deal with some bad news. The premiere of the seventh season will be delayed by a week, till the 2nd of March. The premiere is delayed because The CW has planned a special, 90-minute long premiere episode of
Superman & Lois. After the premiere, a 30-minute special called
Superman & Lois: Legacy of Hope will follow.
Superman & Lois