IIRC, AA is suppose to move over to the DL gates in T2W when the new terminal opens up. And on some forum it was was mentioned that AA will be taking over DL's SC as well. Keep in mind that AA has almost 30 mainline flights each day out of SAN (On mostly 321s). And BA is now 2X to LHR, plus the JL flight to NRT. Moreover, we're probably a year-and-a-half away from this happening anyway. I don't think Chase wants to wait that long for their new lounge to open. On the other hand, it doesn't look like any work is being done where their lounge is suppose to go. (It's that area across form gate 48, next to where LH has a banner on the wall, correct?) So, who knows.