Thanks Vcutter & baldrick.
Both make good points. I guess I'll have to think a little deeper about exactly what setting I want to cover. I understand the points about stats etc.. I guess it shouldn't be too hard to come up with a few minor stat changes to reflect some of the gradual improvements (or at least differences) in 'next gen' vehicles.
I want something that would reflect a similar level of conflict, but maybe one that didn't have tac-nukes and the fall of the Soviet Union as a backdrop, maybe something that happens in the near future (though without wanting to too closely resemble the current conflict in Ukraine. Perhaps, some form of pandemic, but again, I don't want it to lean too heavily on the real life suffering going on currently.
I was thinking that drones and sattelite capabilities could play a big part of the build-up to 'missions', perhaps some Intel gathering phase of the game that could have an impact on how easy it would be to have the players complete their objectives, or not, depending on how well they did in that preceeding phase of the game.
Anyhow, thanks for both your comments, it's given me food for thought.