Antorus gets released in 5 more days (US time).
I wouldn't think that 7.3.5 would be released with the Wing 4 LFR Antorus thing. 7.3.5 likely comes out in the PTR either the same week as Antorus, or the week after (With the week after Antorus being more likely).
7.3.5 would likely come out either on the same day as the LFR wing 4's thing, or on the week after.
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Nope, this isn't 7.3.2. Raid testing isn't a thing. This is just for the Leveling updates, as well as the Battlegrounds (And, possibly the Allied Races).
I'll say 2 months of testing, thank you very much.