Airline alliances

In the real world, many of the world's biggest airlines have either formed or joined airline alliances. Some of the biggest ones include Star Alliance, SkyTeam, and oneworld.

It would be nice if Air Tycoon 2 had this feature. Airlines could form or join alliances with other airlines.

All members could receive benefits like:
1. Every allied airline can build a limited number of routes from another ally's hubs.
2. Every allied airline gets a boost in the rate of increase in all three abilities (maybe the average).
Let's say that my airline's maintenance ability was increasing at 0.4 points per quarter and I formed an alliance with an airline whose maintenance ability was increasing at 0.6 points per quarter. Our alliance would grant an extra 0.5 points per quarter boost for maintenance ability since (0.4 + 0.6)/2 = 0.5. So, my airline would now increase its maintenance ability at 0.9 points per quarter, and my ally's ability would increase at 1.1 points per quarter.

If you can think of additional possibilities for benefits, those would be great as well, but the concept itself is what matters.

I like this idea. And you could be able to borrow aircraft from you allies.