Personally, I think Loki's going to make a beeline for the Heaven/Astral Layer of Elbaph, in order to do...something to destroy Yggdrasil and start the Final War.
Mind, he'll probably leave a trail of bodies and destruction behind him trying to get all the way up there. But, I think Loki has his bandaged eyes on the prize. Personally, I'm thinking there's probably some sort of Nika Temple or something up in the Heaven Layer, and Loki will have to get there to do...whatever it is he's going to do.
Plus, we probably need to at least see what's up there before we leave Elbaph. This is as good an excuse as any. I wouldn't even be surprised if Loki's last remaining Seastone cuff melts away from the heat of the sun up there or something. That would kind of be a epic moment.
still dont get it, whats the older woman supposed to mean?
Personally, I'm leading towards this hinting at Imu. I know a lot of people think Imu isn't a woman, and it definitely is hard to tell, but I think that's the only person that we know of that it possibly could be?
Jarul is 408 years old. So, that kind of limits who he might be talking about in the first place.
Big Mom? It's a nice idea, and I do think Big Mom will eventually return along with Kaido, but I doubt it's her. She's only 68. That's practically a teenager in Giant terms.
Doctor Kureha is really the only other possible person that I can think of who would even come close. But, even she's only a spritely 141.
Zunesha is technically possible, since Zunesha is over a 1000 years old. Technically, we don't know Zunesha's gender, even though it sounds male in the anime. I just don't know if Jarul would even know that Zunesha exists? Plus, we have no reason to think Jarul is into this kind of stuff. Although, who could blame him? Those legs do go on for miles! Love does tend to find a way in the One Piece World. I still think this is less likely than Imu.
Imu's really the only character who might give Jarul a run for his money in the age department and still be his type. And there are some conspiracy theories out there that Jarul is secretly the villain of this whole arc. A Giant Supremacist Fundamentalist who wants Elbaph to return to it's warrior roots. I don't know if I buy that, but I can't say it's impossible, either. So, there's some possibility that Jarul has worked with Imu and the World Government to cause just enough trouble to make everyone want to take up arms again and turn away from the ways of peace that their society has been headed towards for the last few years.