I didn't care for this story at all, but that'd legit make me hate it. So the probability of you being right is probably not low. Though, more than outright death, I think Ben's gonna get lost or stuck somewhere while Janine wants to find a way to bail him out or something.
And hey, as far as we're going the "worst it can get", maybe the "person from her past" in her own mini could be Marcus and they strike up a relationship after enough time has elapsed, who knows? After all, despite Beyond being a pretty solid Spider-story overall and genuinely seeming to be trying to build Ben up to something that wasn't a bent-out-of-shape-cartoony-villain, I guess that's the kind of thing we can actively expect these days as to how stories progress.