[[ Uhh…. A villain summoning a toad in Boruto is not sufficient reason to believe Jiraiya is alive. Jiraiya did not create the toads, nor was he integral to their existence. Toads have been on mount Mokyobu  before Jiraiya was born. Jiraiya was just one of few people who had a contract with them. Minato and Naruto also had contracts.

Sasuke killed Manda, who hated him, but still was able to forge a new contract with Aoda. Aoda listens to him and respects him. Summon animals do not hive-mind, they can think and make decisions on their own, such as Gamabunta regularly berating Naruto during his early summons.

Jiraiya drowned, his body is at the bottom of a lake. AU, maybe. Plausible canon? Absolutely not. ]]

[[ It’s really fitting the first full fight we see of Kisame being on his own is…like that. Itachi was not kidding when he said Kisame tends to draw a lot of attention. A giant water dome the size of a football field just rolling around the forest is going to make people look. ]]