put the airline of which the CEO quit, up for sale? In bits or as a whole? I think this option has been discussed before in some form or another. If somebody wants to buy my airline, he makes me an offer. I accept it, my entire airline is transferred to merge with his. Let's say he offered me 100 million for it, I take my 100 million and start again somewhere else or at the same place. Or sell pizza's.
At first I agreed with the ideas but then I thought... hang on a minute... lets say a new player joins the game at january 1 2012 game time. Modern Times, almost no available airports, few aircraft on the market. Out of sheer desperation he starts an airline in some God forsaken place. Then, at january 2 2012, a major airline CEO gets bored and decides he wants to sell pizza's. The next player to join then gets to 'own' that major airline.
What you could do, is have EVERYBODY apply for that airline. Also the players currently playing. Whoever decides who gets the job, I leave up to you sami but lets say I get the job, my airline becomes available. Players can apply for mine as well. Etc etc. That seems fairer to me.