According to the AJC (and Wall Street Journal,)
Delta is looking into making a bid to buy American Airlines parent company AMR Corp. They also mention that a capital group is looking into them, and so "are other possible firms."
Report: Delta considering bid for American | ajc.com
If this materializes, and actually happens with Delta, it will actually start looking like a monopoly (ie Bell System,) in my opinion.
Any thoughts?