In the 102 SBS, Oda answered a question.
D: Hello, Odacchi! Looking at the cover page of Chapter 1031, it seems like Bepo is the No. 2 of the Heart Pirates, right!? I was surprised because I thought that Penguin, Shachi, and Bepo were all tied for No. 2! Are you saying that Bepo (with Sulong?) is the strongest between them? P.N. Pudding-ya
O: That cover, huh? Similar to Zoro, not all of those characters have the title of first mate. I selected the No. 2s as I saw fit. Usually, Shachi and Penguin are more dependable, but those two—who have seen Bepo’s Sulong form—are no match for Bepo in terms of fighting power…! I acknowledge him.
This makes me think we will see Sulong Bepo soon. Oda claimed Shachi and Penguin normally are better than Bepo and would be better candidates for first mate except when you add in Sulong. Because when Bepo transforms they are no match for him. So how are we going to see this play out?
In Chapter 1063, Blackbeard attacked Law and pushed him into a corner forcing him to fight back. So how will this fight play out?
For narrative reasons, I think Blackbeard will win or at least it ends in some kind of tie as I don’t see Law beating the polar opposite to Luffy. I think what can save Law is Bepo in Sulong. But it’s the middle of the day as for as I can tell, there is no full moon, so how can Bepo transform?
Well! Personally I believe Law found a work around. There’s always a work around to these kinds of powers that have conditions. Law is a surgeon he has a perfect understanding of how the human body works and I assume that applies to Minks as well.
In Wano Act 1, Bepo was sick from the water he drank and Law used his power to scan him and saw what was paining him. So in theory what if Law uses his powers to scan Bepo during a full moon and was able to see exactly what goes on in a Mink’s body during a full moon that makes them go Sulong?
If Law is able to isolate the gene in his body that does this then in theory Law could possibly trigger this gene with his room powers. This will force Bepo into Sulong form without the moon.
Now this probably comes at a risk because doing this could mean there is a timer to it or Bepo simply won’t be able to turn back because the way a Sulong turns back into a Mink is simply to stop looking at the moon. So Bepo would have no way to turn back unless Law reverses it and does it himself which might be easier said than done.
Theory by MrBushido56 (https://www.reddit.com/user/MrBushido56)