In a compellingly reimagined One Piece plotline, Shanks, once known as one of the Yonko, surrenders his pirate status to join the Marines. He assumes the role of an Admiral, adopting a new epithet related to the shade of tangerine. Thus, he is known as the "Tangerine Rat," or "Mikan-iro no Nezumi" (みかん色の鼠), which translates to "Tangerine-Colored Rat" in English.
The twist comes with Shanks' betrayal, revealing crucial secrets about Luffy to the Gorosei. He discloses the information about Luffy's newly acquired Nika God Zoan, a significant development that could potentially shift the balance of power within the One Piece world.
Now under Shanks' leadership, even the previously corrupt Marine Captain Nezumi finds himself compelled to follow his orders dutifully.
In his new role, Shanks becomes a firm advocate for a new kind of justice — "Celestial Justice." This form of justice underscores the absolute rule and divine status of the Celestial Dragons, a concept that Shanks himself champions.
An example of a potential dialogue could be:
Shanks (みかん色の鼠): "I have revealed the truth about Luffy and his Nika God Zoan to the Gorosei. Now, under the Celestial Justice, we shall reinforce the divine rule of the Celestial Dragons."
Nezumi: "I stand by you, Admiral Mikan-iro no Nezumi. Let the will of the Celestial Dragons be enforced."
This scenario paints Shanks in a new light, as a character who has swapped his allegiances and his beliefs, symbolized by his vibrant tangerine attire. But, please note that this concept is a hypothetical or fan-made scenario as of my last update in September 2021. In the official One Piece series, these events have not taken place.