Why aren't any of the Middle Eastern airlines in an alliance? I guess that many people have knocked on the door of Emirates, but other than some codeshare agreements (AF-ME, QR-LH), not a lot have come out of it.
I coiuld imagine a couple of memberships:
Star: Gulf or Emirates (but not both), definitely Qatar because of their existing ties with LH
oneworld: Emirates or Gulf, depending on who goes to Star, maybe Turkish (old ally of Swissair BTW)
Skyteam: ME), Brazil">MEA from Lebanon (existing link with AF)
Which still leaves people like Kuwait, Egyptair, El Al, Jordanian and maybe also Saudi Arabian, which don't have any existing ties, but which could fill some gaps on the map, no?