Board Thread:Theories and Rumors/@comment-30938718-20180803102949/@comment-34175192-20181003232251

Chimadino wrote: A bit off topic but these are the characters who are likely died/will die in Ninjago.

Pythor: He most likely died sometime after DotD.

Time Twins: They were likely died after the Iron Doom was destroyed.

Ash: It seems like he wasn't with the others beacuse he was killed by the SoG before S9. The other elemental masters that didn't appear (besides Chamille) were confirmed to be captured, so I assume Ash would be alive.

And the Iron Doom was never destroyed (was it?) just simply lost in time. If Wu lived, they'd live.