Personally I really liked Keeler in the opening few Horus Heresy novels and it is a slight shame they haven't been able to incorporate her more fully into the ongoing narrative.
- Shes the first Imperial Saint.
- Shes the first person to manifest the God Emperors power. Even Lorgar did not do this.
- She gives Sigismund a nudge that is arguably going to snowball into the Black Templars.
- She obviously influences Garro.
- They are setting up that she has a major impact on spreading the early Church.
Since we are getting close to the end game this makes me wonder how they are going to tie up the story of one of the original character which started the Horus Heresy. Personally I think it should be something suitably major and that ties into
40k. They have done this before:
Which makes a lot of sense. At its core the Horus Heresy is a prequel novel so it makes sense that the roots of a lot of things we see in
40k would get explained here. So what could they do?
1) Keeler founds the Ecclesiarchy
Outside of any prior lore this sounds pretty straight forward. However, in the old Sisters of Battle codex its stated that the Church was founded by an Imperial Army veteran who fought at Terra. Who was a dude.
So you would have to put in quite a major retcon for that to work. Since they did an Eisenhorn short story where Keelers images were considered holy icons this means they can't chalk this down to distorted history. People knew who that historical figure was. Now, they could have it where she is the reason and inspiration why this Imperial Army guy goes on to found the Ecclesiarchy (
BTW I am not 100% on all the short stories so let me know if this has happened), but I feel that wouldn't conclusively end her story.
2) Keeler somehow founds the Sisters of Battle
I know I know. But hear me out. Shes a woman and manifests an act of faith. This is something that
SoB do. That's a pretty solid connection. We know that the
SoB are found by Goge Vandire 5000 years after the Heresy. Theres nothing to say that Keeler didn't go to San Leor. Shes currently on Terra, but that seems to be because its where shes needed. For example she appears to have become ethereal and sort of aware of future events such as the betrayel at Istvaan and saying that Sigismund would be needed. So, if she knows that going to this backwater world and creating the
SoB will eventually have big repercussions down the line that would
IMO make a lot of sense. If Keeler can see the future then she has reason to do this since she would be aware of the butterfly effect these actions would have.
3) Keeler is Celestine
Aside from the aforementioned parallels between her powers and those Sisters of Battle manifest theres a few things which point to this.
Her role in the Horus Heresy has been exactly the same as how Celestine was depicted during the Gathering Storm. She is this ethereal individual who is being guided by the Emperor and trying to bring events to a preferred outcome
. Keeler is also referred to increasingly as "The Saint" the Horus Heresy. Now Celestine isn't the only Saint but she is by far the most prominent and they have already done similar origin stories
. This tendency makes me feel its less likely that they would make her her own character whose role would play out.
Celestine is also immortal. This makes it certainly possible that she could have been alive for that long. Why would the Emperor only decide to have such an agent doing his will in the 41st millennium and wouldn't have done this when he was about to be interred on the Golden Throne.
So its possible that Celestine is simply a title that Keeler has taken for herself. That she lived so many lives and become so dedicated to the Emperors cause that he former life and identity fell away from her. The fact she is called the Saint instead of Keeler is pretty significant.
This wouldn't be inconsistent with the Sisters of Battle lore. All that was known about Celestine was that she was a Sister Repentia who died and was reincarnated. Theres nothing to say that she had actually been doing other things.
Also, the subject of immortality and individuals being empowered by the Emperor has been a plot point, one quite notable in fact, in the Horus Heresy. Celestine is, pretty much the only Imperial character who has similar abilities to that. Which would suggest that the writers might be building up to turning Keeler into Celestine origin story.