I just don't see it happening, although not much is impossible in modern football. He's been very pro-Inter and quite anti-Juve for most of his career, even if I don't see him being the kind of person who will stick to his morals. Best case scenario will be Saudis buying him. What's most likely happening is using Juve to force Inter's hand.
I think we'll see a clear theme in the media where all the moves fans see as good (younger and from unfamilar leagues is always more attractive for any fan base, due to mystery factor) will be set up as Giuntoli's and then the more experienced players we get linked to will be Allegri wielding his power. They'll do this because the idea of an internal struggle at Juventus is appealing to them, even if he's only been here 5 minutes. And many juventini will go along with it as Allegri is unpopular. But the truth is that Giuntoli also brought in several experienced players at Napoli over the years as well, even if his usual targets are players under 27.
Lukaku they may see as an opportunity to weaken Inter and buy a player we have been linked to for many years. In my opinion it won't play out like that as Lukaku us already showing signs of serious decline, and for a heavyweight like him it's not going to get any better.