I doubt it's the katasrophe yet. Kurono's last sentence "At a time like this...... We've got.....a mission.........?!" makes me think that it's just a normal mission.
Because he knows when the timer will hit zero and I think he expects to be transferred then or shortly before.
So this comment makes no sense, unless we still have some time until it hits zero and there is another mission before the katastrophe. Since I don't think his comment is referring to the nishi situation (like "i can't believe nishi lucked out that much").
I honestly didn't expect another mission before the counter runs out. But it's not that bad if Inaba finally get's killed or the panda get's the remaining 60 points and brings Izumi back for the katastrophe.

