I dont think think the spoilers are implying Ryuma is 1 eyed. Just that Ushimaru was and is related to Ryuma. So thus Zoro and Ushimaru look similar in that regard.
We can't really tell from Zombie Ryuma if he's actually 1 eyed the bandage doesn't cover the 2nd eye entirely and the scar he has on his face doesn't cross the eyes.
We have to remember, Ryuma is from hundreds of years ago, how could anyone recognize him physically? That's why it just implies Zoro looks like Ushimaru, who in turn is related to Ryuma
We can't really tell from Zombie Ryuma if he's actually 1 eyed the bandage doesn't cover the 2nd eye entirely and the scar he has on his face doesn't cross the eyes.
We have to remember, Ryuma is from hundreds of years ago, how could anyone recognize him physically? That's why it just implies Zoro looks like Ushimaru, who in turn is related to Ryuma