Isyama did state what Eren said about controlling the coordinate by making contact with someone who has royal blood -Historia- will GREATLY affect the story, this is quite exciting, since it seems my theory for SnK is actually true, it feels great to be in the right.
1- I can't see her dying, she is the last person with royal blood-save for Zeke- and she doesn't have an hier to rule after her, killing her would put the story to a halt and Eldia would get crushed.
2-She won't take the coordinate, nobody of the royal family would, since that would make the ideology of the First King influence the current owner into agreeing with the fall of Eldia and keeping the people in the walls, that didn't work on either Grisha or Eren because they aren't royals. Giving it to Historia would just mean it won't be used and Eldia crushed by Marely, just like scenario one. The Dangerous thing would be Zeke taking the coordinate, since it seems he is on the "Marely4life" boat, he would agree with the fall of the walls and crush Eldia, just like scenario one and two.
3-Now this, as the troll
@EmptySoul said, is bad for me -since I am a huge Annie fan-. The only shifter Eldia has currently is Annie since she won't be eating Eren as mentioned in point 2, and in order to control the coordinate it seems the royal blood Eren needs to have contact with must be a titan, as seen that when Eren touched Dina's titan he could use the coordinate, but when he held hands with Historia, he couldn't during the uprising arc, all he could get is reach some memories, he couldn't utilize the coordinate.So Eren probably used his mind and didn't mention that last chapter, because he must have known if he mentioned that they would turn Historia into a titan, but Eren also said its only a theory of his, so he considered it being wrong.But if it is indeed true, then that would be a hard situation. Since Historia should be a mindless titan or a shifter in order for Eren to use the coordinate when he makes contact, and here comes Annie
, Historia would need to eat Annie in order to become a shifter since keeping her as a mindless titan would be stupid, but this is bad writing imo. Since it would be Isyama keeping one of the best characters he made away for 3 years in a crystal, then when she comes back she gets eaten in 2 panels
.Its like saying "Hi Annie!Bye Annie!".So I don't want this to become true,its like Isyama saying "Annie or Eldia ?" , and I would choose Annie, anyday of the week.
4-She is one of the keys to the story of SnK, the others being Ymir,Zeke and Grisha.