These new Han matches. Glad to see my guy getting some love, but wow.
As for the resistance to time stop, I can honestly see it going both ways. It's been bugging me for a bit, but I'm fairly certain it was designed to freeze time for non-ability users. Like it was a condition. Otherwise someone like Sun-il would also have resistance. But we never saw him, so He might've been frozen too. Given his personality it seems unlikely that he wouldn't immediately seek out Han in such a situation.
Assuming Han resists time stop, then I think the battle will be much easier for him, as he has everything up until his meteor feat during the church of masks arc. Meaning he has his stat amp, and the charge time for his spiral mana bomb is relatively negligible, capable of one shotting other 8-A characters. Not to mention his light speed attacks through his lightning spells.
I think Han is far too cautious to all The World to touch him. And it would have to manage to touch him through nigh infinite danmaku, as well as his golems and mana barrier, which I don't see happening at all. I don't see him getting close to Han, with each attack being capable of one shotting him. His regen is good here, but if Han notices he will likely go for something like a douchery, shackles, and sleep manipulation combo. And while DIO may have some resistance, I don't think the adrenaline thing is really a factor, as Jee-Han employs this in battles against other people whom are running high on adrenaline. Not to mention that douchery would momentarily stun his thinking regardless. So shackles plus sleep manipulation would be viable here.
I'm not sure his Han would be able to nullify The World or something. I don't think JoJo's has an equivalent energy source to mana.
Regardless, if Han resists time stop, then he should take it pretty handily. Intelligence and observe really help his case here. If not then DIO should stand a much better chance.