While the idea is certainly interesting, I doubt it will happen. And not just because different teams are working on AO and Pacific or the fact that the European and Pacific theaters are so far apart I struggle to realistically see how one would really affect the other short of Japan invading Siberia and steamrolling through it/US invasion from either side.
But how would they implement it?
Currently, in order to have a special event trigger in one Campaign or Scenario as a result of actions taken in another Campaign/Scenario, they give you something that can't be replicated or otherwise acquired during that window of time as a Token. Things like certain Heroes like Adolf Galland for the Operation Mercury trade, or prototype/captured equipment in too small amounts to make use of in any way but as the token. And they carry over from Scenario to Scenario, Campaign to Campaign easily because the game was designed to carry that stuff over from the start, so all the systems were already in place.
So, unless they come up with some new system for setting up special event flags, the only way currently to set up those types of events would be to somehow get a token you earn in Pacific into an AO campaign. Which, unless they do something funky like allow you to be a German/Japanese super general who swaps between working for both countries or give you the option to import a Japanese core in AO (and vice versa) solely for tokens and nothing else, is pretty much impossible.
Admittedly, Order of Battle had something kinda similar in concept, in that by owning X campaign you received a benefit of some sort for owning Y campaign. In the regular German Campaign, by owning the Kriegsmarine Campaign you can get a special 20mm Flak gun and by owning the Winter War Campaign you get a special Infantry division. US Pacific players get Australian Commandos for owning the Burma Road Campaign. And if you own the Morning Sun Campaign (Japan invading China) you get a special Air Hero in the Rising Sun (Japan Pacific) regardless if you import a Core or not. They also have a special Motorcycle Unit you can get in the Morning Sun Campaign for owning a completely different game!
None of these are really huge, game defining bonuses or really fit the idea of having the actual events of one Campaign influencing another though.
Also, my personal opinion is that while these bonus add some nice extra flavor for people that own the right DLC, it kinda boils down to the game actively encouraging you to buy the more minor campaigns, which you may otherwise be uninterested in, or else you miss out on stuff, and I'm not a huge fan of that sort of behavior (Even less so the whole 'Buy an entirely separate game' bonus). So I'm not exactly sure I want to see it implemented in PC2.
Anyway, Order of Battle aside, it's easy for us as players to come up with great (and sometimes not so great, depending on who you ask
) ideas we want to see and seem easy to implement, but what may seem easy to us may actually be much more difficult to program that we realize, or would take to much time/effort for too little a benefit in the eyes of the developers. And I do feel like having the AO and Pacific Campaigns influence each other is a very interesting idea, I feel like it falls into this category.
