Board Thread:Manga/@comment-27125793-20190202152111/@comment-38964308-20200613155936

Jumbernaut wrote: Even before Yelena told Zeke's plan to Eren, it would already have been in the eldians best interest to have Historia bear a child of royal blood. Whether it's cruel or not, at the time it was already something essential to the survival of "humanity" within the walls.

Also, since Zeke's plan was to sterilize all eldians and allow them to live the rest of their lives, he himself was only going to live for one more year or so. After his death, there would be nothing stopping Historia to undo the sterilization if she wanted to. To secure the end of the titans for sure, Zeke could have instructed Yelena to kill Historia and her baby once he achieved his goal, to end the royal bloodline. That would also prevent the Founding titan from ever using the rumbling, so her death would have to be kept a secret to prevent an assault from the rest of the world. Nice theory, however, at the very least, I wonder about the part when Historia and her baby would have to be killed ,because unlike the other Reiss monarchs, Historia was shown in public and is largely involved in caritative actions, people will defenitely sense that something is wrong is she is killed and nowhere to found, and the outside world will definitely take the opportunity if they know that Paradis Island's queen is no longer alive,that's why she will probabely NOT inherit the Beast Titan, who will be given to random eldian (maybe Connie's mother) and Yelena's organization will replace the millitary as the head of government to ensure that no royalty were be allowed to enherit one of the nine titans (Why the hell did they even gave the Garrison the titan serums?")