I actually think this, too. She's prepared to be hated by
Naruto, but also respects his decision. She heard him say, "I want to help Sasuke", and might decide to do so in her own way by joining him. She'll hear Sasuke's story about Konoha's dark side, and that they are liars/traitors, and she'll think back to Naruto and Kakashi keeping the secret of Itachi from her. She may even be convinced by Sasuke that Konoha are really coming after him to silence him.
The simple fact that there's no way she could ever really kill him, combined with the power difference between her crew and his... she's pretty much going to be faced with, "Join me or die", and I think part of her has always longed to be able to go with him, ever since he denied her request three years ago.
It all depends on if Naruto shows up to save her before or after that choice. If it's after, I can see Sakura's betrayal as the trump card Sasuke needs to escape his Sage Mode rival, as I still think Sasuke'll either be hurting from his fights or be unable to keep up with Naruto.
Not sure how he'll convince her that the best way to handle his emotional trauma is by using Amaterasu on everyone, but that's his job, not mine. I mean, he seems to have convinced the rest of his emo band.
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