I have recently read a book about the Berlin airlift. The level of coordination and the sheer number of aircraft involved absolutely blew my mind.
I know 2022 isn't really the right year for an anniversary (started in 1948 and ended a year later). But I think doing something similar as a multiplayer-event in Flightgear would be great
Although it would require some personnel...
In 2019 there was a (real-life) celebration with some beautiful formation flying of those majestic old planes: https://www.youtube.com/watch?v=TeHYmZQt2eE
Thanks to some hardworking aircraft developers, we have a very nice DC-3/C-47 and a Lockheed Starliner to use (second one wasn't used I think). Sadly the DC-4 isn't that far in development. But the scenery around Berlin Tempelhof is quite decent.
You could give ATC-controllers at the home airports some freight-lists and the pilots would load and deliver the according weight.
There wasn't much going on for multiplayer in the past days. But when this is planned longer in advance maybe it can be made possible.
Edit: it's a Lockheed Super Constellation which couldn't be used, because it had it's first flight one year later. So the dc-3 is the only one available