The latest chapter semi confirms that Uranus is in Elbaf, especially considering that Pluton was confirmed to be hidden in Wano and Poseidon is Shirahoshi, a mermaid from FishMan Island. Imu also confirmed that an Ancient Weapon is in Elbaf, which is likely Uranus.
So, Imu is in Elbaf searching for Uranus, while Loki doesn't even seem to know anything about it.
My question is that Why hasn't Imu taken over Wano all this time, knowing that Pluton is likely hidden there?
And please don't just answer with "Kaido," because that's a weak argument. Imu is clearly far stronger than Kaido and should have been capable of taking over Wano. But even if we assume Kaido case was an obstacle here, Imu had centuries since Ryuma's death to invade Wano, take control of the country, and search for Pluton.
So why was Imu seemingly willing and prepared to take over Elbaf, but never made a serious move against Wano despite knowing that one of the Ancient Weapons was hidden there?
I remember Brook mentioning during his backstory that Wano was one of the nations feared by outsiders, alongside Elbaf and its giants.
However, so far, Oda has only portrayed Ryuma as the only godlike figure in Wano, someone powerful enough to stand against outside threats.
Is it possible that there were other legendary samurai in Wano who were strong enough to challenge Imu? Could another samurai have actually fought against Imu in the past?
wano is far easier to invade then elbaf

