AS is unlikely to join, since it has alliances with much of Skyteam, including AF*, KL*, DL*, CO, and NW* (asterisks indicate EQM partners). As far as OW goes, AS is already partnered with AA*, BA, LA*, QF, and CX. Most of the Mileage Plan members like it this way, since it allows us to collect miles from both OW and ST carriers, and it's a popular airline for people to use as a "second" account in the States because it can catch miles from a lot of different airlines.