Season 2 will end with 2.9, the reward blog is just taking a little longer to bake this time around. Courtney answered when to expect the blog on the Stronghold stream yesterday that hopefully it will come out next week. F5 standing by!
Although we aren't ready to talk about Season 3 details, we can say that it will start sometime in the 2.10 timeframe and if it ended with the "Rise-like expansion" it wouldn't be surprising.