This rumor has been brought up from time to time here, in blogs, and on A.net, etc... Yes, DL does have the resources to purchase AS; however, operationally speaking it is not really feasible or logical. It will do more damage than good. This is why DL is weaving in close with AS, so AS can give what DL has been trying to achieve on the west coast. That is about it, DL will not buy AS out, unless AS starts stumping bad and starts losing their market leadership on the west coast.
If this were to happen, the fax machine over at UA will start beeping with my request for status match printing out.