Kaiser Weapon Box?
They still drop. I got a kaiser weapon box from w1z1 normal mode and then a blue super weapon box from king toad the same day
I also got one (from world 1, zone 2 normal mode).
Ive done enough dailies to get myself a crimson sword/shield. within that time ive gotten 2 super boxes, and 1 kaiser. i needed gold so i sold the kaiser skin, but kept the super weapon boxes. Lets just say im super happy with the event since it got me the red skins i wanted plus bonus boxes!
5 super boxes and 1 kaiser box this year. I haven’t done tribulation zones today but I’m going to give it a shot and see if I can get any more.