The 2 days is for the ESO plus sale i think (The 5000 crowns to 4000) I don't think it will be gone in 2 days, especially before we get the preview crates, seems a bit ridiculous to give out preview crates after the crates have been released :P
We'll probably get them in at the start of October.
Considering a Crate Season runs for ~3 months and Baandari came out July 3rd, we'll probably see New Moon Crates release early to mid October.
Which would make sense, considering they're the "Spooky" themed crate for this year, like Hollowjack last year and Reaper's Harvest the year before. Fall season crates are the only ones that are seasonally themed, and always have Undead/Ghost/Spooky/etc. stuff.
I think we were given a preview crate from the Baandari set a bit before they were released. I guess maybe about 2-3 weeks after they give us the preview or at least somewhere at the start of October.