Everything seems to indicate that this could be the inspiration that Oda had to create Shanks' “twin”

It is well known that The final section of the One Piece manga has addressed shocking events that have marked a before and after in the plot, preparing the ground for a conflict of epic proportions that will feature very powerful and disturbing characters, as could be seen in the chapter #1121 from the manga in which the silhouette of a mysterious individual who many allege is Shanks' “twin” brother.
In addition, This was not the first time this disturbing individual appearedsince in the chapter #907 A mysterious character with an appearance similar to Shanks could be seen meeting with the Five Elders during the Levely, an event that gave way to the popular theory about the “twin” of the captain of the Redhead Piratesbecause this individual had a very formal way of speaking and did not have the distinctive scar on his eye, a detail that left many questions in the followers.
And everything seems to indicate that, for years, Oda left some clues about the identity and role of Shanks' twin in plain sightwhich went unnoticed by some followers. However, after the appearance of this mysterious individual in Elbaph, fans have begun to tie up the loose ends, creating new and interesting theories about this “double” of the redhead.
This post contains spoilers chapter #1134 of the One Piece manga.
One Piece anticipated the role of Shanks' “twin” many years ago
Everything seems to indicate that the role of Shanks' twin could be inspired by the original concept of this pirate
The Elbaph arc has begun full of action and very interesting revelations.since in just a few chapters the identity of Loki, also known as the Cursed Prince, was revealed. But that's not all, because in this installment Shanks' “twin” also made an appearance, who has appeared on this island in a very disturbing way and with dark intentions.
Evidently, the appearance of this mysterious individual who looks similar to Shanks caused a stir among some fans, who were perplexed by this individual and the role he will have in the coming events of the work. However, the rest of the followers have taken the debut of this character very calmly, because for several years had speculated and anticipated the role of this “twin” in the series.
In fact, some fans have taken this revelation completely normal, since for years there was speculation about the possibility that Shanks had a “twin”which would have a very different role from that of the redhead, because this would serve the World Government. And, apparently, this detail was in sight for a long time, since the redhead's “double” could be inspired by the original concept of this pirate.

And in the beginning, Eiichiro Oda planned to launch a very different manga called “Land, the Dragon and the Ten Thieves”, story that was discarded to make way for the creation of One Piece. However, the mangaka took some elements and designs that he would later introduce in his magnum opus, such as the design of Shanks, who in this story I was going to be a knighta detail that the artist could have used to create the “twin” of this pirate, who works for the World Government and is part of the “Holy Knights”as has been hinted at in the last chapters.
It should be noted that the inspiration for Shanks' “twin” may have been in plain sight in the original concept that Oda had for this pirate in his old manga, so it is a matter of time to confirm all the hypotheses regarding this mysterious character who will have a very prominent role in the coming events of the work.
In addition to this, the appearance of this “twin” of Shanks has given way to new theories which indicate that These characters could be the representation of Skoll and Hatichildren of the Norse wolf Fenrir, who represent the concepts of the Sun and the Moon, offering a brief idea of the role that this “double” will have in the upcoming events of the series.
It remains to wait for Reveal more details about Shanks' “twin”which has caused a commotion after its arrival in Elbaph, since everything seems to indicate that the events on this island will have a chaotic and unexpected turn that will completely change what has been seen in the plot.