If there are any DL employees here, I have a question. I work for 9E (non-wholly owned by NWA/DAL) and plan to travel to ICN next week. We get Zed-Low on KE and Zed-Medium on DL (or of course NWA for free) but looking at backup flights. DL has a non-stop from ATL to ICN on a 777. As a NWA Airlink carrier on a ZED ticket, does DL upgrade us to business if seats are available? I'd hate to sit in coach for that many hours knowing I could have set in WBC on a 747 but with a connection. Any inputs is appreciated!!