Maybe it's not canon, but we can't make assumptions.
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.
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
Less complicated if they're the same universe but The Flash doesn't reference the Schumacher films. Keeps everything tidy, at least on this wiki.
I agree that the series isn't set in the 1940s. Seemed half-assed, especially when that comic had modern computers, likely a consequence of this universe having a different technological development timeline than the real world. The comic isn't bad, but it does feature a Penguin cameo that clearly isn't Danny DeVito or a corpse, so I guess, just like Joker, a successor/copycat continues the name.
Could you explain each piece of evidence for each film's timeline? I would find it very useful. Is Penguin's birth certificate ever in the film and I just missed it?
Wheres Bruce Thomas Batman? He's technically a Burtonverse Batman, even if it was just for silly commercials.
While an actual Penguin birth certificate exists, I can't find it in the film. I can see other birth certificates, however, and they do say 1950-1951.
Batman has dates stating 1913, 1947, 1948 and 1953. I saw someone place the Burton films in 2013 and 2016, I think, based on Jack Napier's criminal record. The Catwoman 80th Anniversary story featuring Michelle Pfeiffer is stated as the 1940s Catwoman.
Unfortunately, I don't think they paid attention to the timeline that closely.