The second death is if the first one is faked then she definitely dies during the Incursion during Secret Wars. Everybody except a very small few did.
To get around this you either have to say that literally everything ending disrupts her power or that in his new cosmic omnipotence Doom knew what would happen and prevented her death with her existing somewhere we never saw.
Obviously Hickman has to be aware of this problem as it is his own big story.
+100 on this analysis of Sinister.Fenix wrote: ↑13 Sep 2019, 19:00
Regarding Sinister and how he has been developed over the years...
I think he was mysterious, lethal, extremely powerful, grim and dark... and he never needed to be changed into something else.
Sinister is a backstage player, he moves the pieces from behind, he has his own agenda and his pawns, not understanding his long term game or targets are a basis for his whole character, while some stuff has been revealed spoiling the mystery in the process some other aspects should have been kept in absolute darkness.
I would compare Sinister to Wolverine. We really didnt need to know about his past, it made both characters a lot less interesting and didnt really add much to improve the characters as they could have been improved in many ways without revealing their backgrounds.
(I actually disagree on Wolverine's background though, I think his origin has added to his character.)