So that's how Madara released from Edo-Tensei

[Hashycuz]

Instead of killing themselves, they promised to bring Izuna back by sharing information regarding the edo-tensei.

 

[BazzBee]

Its not been confirmed that they promised to bring back Izune it was just a prediction

 

[uchihadesendent]

maybe that'd be cool if that does happen!

 

[Booker]

I could see this.

 

[ReeseKage]

That seems very plausible. Makes me wonder why the hell Tobirama can't get out if his own jutsu