Probably after Batman & Robin where Robin and Batgirl leave him as sidekicks. He probably retires after their adventures but returns as Batman breifly in this movie.

1989 - Batman

1992 - Batman Returns

1993 - Batman '89*

1995 - Batman Forever*

1997 - Batman & Robin*

2000 - Batman: OnStar 1x01-1x06*

2003 - Batman '89*

2004 - Catwoman*

2010 - Catwoman 80th Anniversary, "Now You See Me"

2019 - Supergirl 5x09, "Crisis on Infinite Earths: Part 1"*

2022 - The Flash

*1 Possible placement One

*2 Erased by Crisis maybe?

*3 Erased by Crisis maybe?

*4 Semi-canon

*5 Possible placement Two

*6 Erased by Crisis maybe?

*7 Pre-crisis

It's possible we'll end up with two timelines.

Pre-Crisis

1989 - Batman

1992 - Batman Returns

1995 - Batman Forever

1997 - Batman & Robin

2000 - Batman: OnStar 1x01-1x06

2004 - Catwoman

2019 - Supergirl 5x09, "Crisis on Infinite Earths: Part 1"

Post-Crisis

1989 - Batman

1992 - Batman Returns

199? - Batman '89

2010 - Catwoman 80th Anniversary, "Now You See Me"

2022 - The Flash

Post-Crisis

1989 - Batman

1992 - Batman Returns

199-200? - Batman '89

2022 - The Flash

Probably something like that in the timeline.

That's... what I did.

The Catwoman comic is a short story that features Michelle Pfeiffer's Catwoman that released after Crisis on Infinite Earths. Using release dates as an indicator, it should be post-Crisis.

The 2010 date is based on trying to rationalise the modern technology in the story while keeping Selina young enough to fit her appearance.

I am not so sure if that story is canon...but the 89's could make Selina a Bruce 's Wife in the end as fans of 89 and Return seem shipping them as much .

Maybe it's not canon, but we can't make assumptions.