So...is this 15 minutes before Buttercup found Blood?
Chances of Bubbles winding up...
In Purgatory: 4%
A twisted dimension made up of Sora's memories: 5%
None of the above: 91% (just because)
Might be Void Erasure. And while this shouldn't happen nor do I see it being possible, I hope Blood finds a way in there as well just to see two of the most opposite girls try to talk Sora out of what she's doing in their own way.
There's Bubbles, the one true friend whose honesty and bubbly innocence touched Sora, but might not make up for her lack of ability to think beyond the black-and-white morality spectrum, which basically turns innocence into ignorance in this case. Even with empathy I can't see her relating to Sora's past tribulations all that well. In fact, I'm willing to bet that its clouding her judgment right now. Suppose Sora's beyond saving at this point? Even if she's convinced into surrendering, the odds of her getting shot down are astronomical unless she leaves the city and becomes some sort of vagabond. Without Cody and/or Beck? PFFFT, fat chance. Not impossible, though it seems like it.
Then we have Blood. Hoo boy, where do I start? Probably the one most likely to give Sora that much needed guidance in her life in light of this hoopla. Not to mention she's a lot more realistic about the situation and has a noble goal she wants Sora to be a part of. A shame she has to be such a bitch about it, ranging from coercing her into killing those transporters to lying about Cody to killing Beck just to teach her a very disproportionate lesson. As Bethany said, she lacks compassion, otherwise she would've told Sora what happened to Cody some 40 odd pages ago. But no, the more I recall past updates the more I'm convinced that above all "good" intentions, Blood just wants Sora for herself regardless of what the Zoner may think and want. And right now, Sora wants her out of her life after all of the shit she pulled. So I'm not sure what Blood would accomplish by meeting her one last time, IF she can get into what basically amounts as a dimensional border that can filter who goes in and who dies. I see no way for her of all people to convince Sora to stop her rampage before the Arabalest and Lockbow do.
Yet I want it to happen. I want to see Bubbles' and Blood's ways of getting Sora to stop this mess. Assuming such a thing happens at all, who "wins"? The one true friend who listens to Sora but has a tough time coping with knowing what she's capable of and where she came from, or the selfish psychokinetic nymph who wants the Zoner girl alive and sane to realize those well intentioned long term goals even if it means being subjected to the tough love
"dickish love" approach, disregarding Sora's own means of happiness every step of the way?
tl;dr Final prediction is that the last confrontation is Bubbles VS Blood. Prize? Sora's will. If it happens, PLACE YOUR BETS NOW! Granted, the odds of Davroe crashing that pretty much overrides all this.