Kill la Kill first aired on Toonami on 2/7/15, which means that if Aniplex shows have 2-year deals, it's done on 2/7/17.
Previously, Toonami lost the rights to Blue Exorcist on 2/22/16, and Gurren Lagann also went on that date. So that means SAO II COULD disappear then too.
HOWEVER, neither show is showing any signs of slowing down, unlike the 1-year deal Sentai shows:
Kill la Kill is streaming episodes 8-15 and 19-21 for a total of 11 episodes.
SAO II is streaming episodes 1-6, 11-14, and 24, also for a total of 11 episodes.
I guess we'll just have to see what happens with these shows as 2/7/17 gets closer! Perhaps they'll even each both get a farewell weekday streaming run of their last 10 episodes? That would be nice!