Some of you really need to join the official discord. Also, read the event updates. It says Temari [Christmas] will be the sign-in for December.

Anyways, this is what Qv said "After Kurenai [Summer] Fireworks Event, Tobirama Senju [Second Hokage]/Deidara [Akatsuki Creation] might be the next Ninjas that will be given as Reward or another set of survey may take place again with a new set of ninjas to choose from". So Tobirama or Deidara is not guarantee to be in fireworks in case someone who didn't read properly didn't catch that. Just assume those two ninja could show up or a different choice for December.

"Tobirama (edo) still so so"...

SMH you need him for edo minato's barrier