Hey guys!

First I'll spam you with pictures of proofs that these ninjas are in survival trial rewards (some screenshots are from extreme , some are from hard difficulty)

Below the screenshots I'll post the list of ninjas

Survival Trial Updated Ninja Rewards:

Udon

Moegi

Yugito [Edo Tensei]

Roshi [Edo Tensei]

Yagura [Edo Tensei]

Tenten [Cheongasm]

Killer Bee [Eight Tails Jinchuriki]

Killer Bee [Seven Sword Style]

Asuma [Edo Tensei]

Sasori [Edo Tensei]

Orochimaru [Akatsuki]

Sai [Suit]

Orochimaru [Youth]

Jiraiya [Youth]

Tsunade [Youth]

Hebihime [Agate]

Zaku

Hidan [Death Possession Blood]

Elder Chiyo [Chikamatsu's 10 Puppets]

Konohamaru [Shippuden]

Kiba [New Year]

Sasuke [Suit]

Sakura [Cloak]