I still think the idea that Ryokugyu eventually replaces some defeated Holy Knights (like say Qillingham/Sommers/Gunko get Saturn’d at the end of Elbaf) is plausible and would be thematic with Issho eventually betraying the WG.
Hence I wonder if there’s been some groundwork laid out with a Shamrock connection…
I think I am the only Admiral fan who likes the idea of Green Bull becoming a Holy Knight lol.
I could see his future role going 1 of 2 ways:
1. He is a dark Parrallel to Akainu, Akainu gets promoted from Admiral but slowly becomes disillusioned with the WG, Green Bull gets promoted from Admiral and becomes even more of an absolute madman to show what Akainu almost became
2. Green Bull rebels and defeats Ju Peter once the Great Cleansing begins (this is how I think his arc is going). Already during Reverie Oda began to plant the seeds of conflict between Green Bull and the Celestial Dragons, him rebelling could become the end-point of that story.
Like I said I prefer option 2 but I could see either path.