Bringing it to this thread to discuss some spoiler related stuff
Anyway, I really don't think Loki will join here. It's not just because of what we saw in this chapter (although this is a big part of it), but I just think Loki's going to get a plot line where he gets his reputation cleared and everyone in Elbaf starts to love and cherish him, and he decides to become the new king (maybe alongside Hajrudin).
Not to mention, as this chapter's shown, he's probably WAY too strong to join and he's also way too big. Same reason why Jinbe couldn't join in FMI, he was above arguably everyone in the crew so Oda held off until the M3 were above him. With Loki, I don't think that'll happen until it's too late, since Loki is one of the strongest characters in the verse going off these spoilers. If and when the crew surpasses him, it'll be after their penultimate fights against Mihawk, Teach, and whoever Sanji fights last.
Holy Knight Harald is one of the strongest characters in the series and in his own tier alongside DR Xebec. These two characters are above the likes of even Roger or Newgate, so the notion that Loki who is still growing is outright stronger than him is not a very sensible take imo. Hence why Oda ultimately had Harald drop his guard in order for Loki to kill him. Moreover, we know for a fact that Shanks defeated Loki 6 years ago. Are we going to now elevate Shanks to Imu level coz he beat Loki?
So even whilst acknowledging that Loki is very strong. a degree of common sense has to come into play at some point.
I'm not conviced Loki is strong as some on here are trying to make him out to be coz it just doesn't make a lot of sense logically or narratively. If this was Teach (candidate for EoS anatgonist) we are talking about then fair enuff but Loki is going to be Nika's ally or a nakama at best. Went on a tangent there but strength wise, I will be shocked if he outperforms Luffy this arc and if he's below Luffy then he is not out of reach for Zoro and Sanji imo.
I do think there's a possibity that where he stands in relation to Zoro and Sanji could be ambigious Post-Elbaf but wouldn't really be the first time something like that has happened. We had a simialr situation when Robin first joined for instance plus we could potentially get a Jinbe type situation where Loki goes on his own litte adventure (for instance to revive Gallela) and then joins the SHs at a later point.
With regards to size, that problem could be very easily solved with a special ability of either Loki's DF or Ragnir's or the SHs building a much bigger ship.
Already mentioned this somewhere prior but with the revelation of what happened in Aurust castle 14 years ago, Hadrujin's justification for keeping Loki tied up has gone up in smoke so all that is left is for Loki to acknowledge Luffy as a man worthy to follow. He already has the offer and only thing that stopped Luffy from insisting was Hadrujin's justification.
Don't think Loki is going to remain on Elbaf or rule alongside Hadrujin. At this point, Hadrujin being anything even remotely close to King whislt Loki is on Elbaf is a pipe dream. Mans best bet is advisor lol