Why Wonder Woman 2 is set in the 1980s.

Why is it set in 1984? Because.

It could have been set at any time. There's no particular significance to 1984.

As a matter of fact I would have set it in the tumultuous 60's when all kinds of significant socio-economic change was going on. Vietnam, social rights movements, moon landing. etc.

Or if you have a jones on for the 80's why not 86 when the Berlin wall came down? The end of the cold war!

Or the 90's - gulf war

or 2000's -  9/11, Iraq/Afghanistan war's...

And that's not to mention WWII

There's no real reason to set it specifically in 1984 except.... because.