There’s one way… and although unlikely, is possible.
Something happened a few days ago on the reverie involving Sabo, vivi, and Kuma. If Sabo’s on the run, he would probably avoid meeting up with the revolutionaries immediately as thatd cause unnecessary issues.
With Sabo having Luffys vivre card, knowing about frankys technological advances and kumas past with Luffy, and Vivi being a Nakama of Luffy there’s a chance those three may come to wano which would make an interesting mirror to Thriller bark with Kuma dying by taking Zoros pain.
I am not leaning toward Luffy because 1. He already made a prediction about Luffy's survival for the month and it was much higher 2. If it was Luffy he would have probably mentioned strawhat rather than saying someone
Or it could be that Hawkins had been checking Luffy and Zoro's survival rate periodically since he first encountered them, and noticed a significant drop in Zoro's, so he kept checking him.
Hawkins is a man who plays the odds, so it would make sense for him to keep tabs on those who entered the Country with the objective to oppose and take down Kaido in case the odds ever shift in their favor.
The Thriller Bark parallel has already been setup for Zoro with this miracle drug. He's going to be receiving double the pain of everything he has endured already, plus what's to come. It just seems out there for Oda to set that up, and it not be linked to Hawkins prediction.
Hawkins has engaged Luffy, Zoro, and Law during the arc, and had a questionable moment with Drake. It would make more sense if he's been looking into all of them over the course of Wano, rather than focused on any single one of them.
The 1% man Hawkins was talking about is Zoro. Zoro was severely injured by Hakai and had to take the Zou medicine. This medicine is going to amplify the pain and damage further later. Zoro will defeat King, while taking a little more damage. Then all straw hats will gather to support Luffy in his fight against Kaido. Zoro may take severe damage again from Kaido. However, Luffy will beat up Kaido and nerf him but fail at last o completely stop him. At this point, Zoro will get up for one last attack and kill Kaido. After this, Zoro will fall down and will be near dead. Of course, he will ultimately not die as Chopper, Marco, or Law will somehow save him. But Zoro may get out of commission for the next whole arc.