the people who are worried aren't worried about what's going to happen in a few months. They're worried about what's going to happen five minutes after the Akatsuki are ash.
Eh, just speaking for myself... it's a bit of a mix. It's more of an ongoing process of asking ourselves 'Does Orochimaru's reasons for wanting us dead (or otherwise under his direct and overwhelming control) (and those reasons definitely exist, regardless of anything else) outweigh Orochimaru's reasons for keeping us alive (and free)?' and doing everything we can to keep the answer of that question looking favorable.
Okay so that became a bit of a word salad, but basically we have to worry about now, 5 minutes from now, 5 hours from now, 5 days from now, 5 weeks from now,
and 5 months from now, with 'now' being defined as the moment of the meeting. shouldn't focus too much on one part and leave ourselves open to another time.
Direct response over, this is just me continuing the line of thought now:
- Will Orochimaru immediately try to kill us? Unlikely but possible.
- Will Orochimaru try to make Hazo's death look like an accident during or after the assault? More much likely, need deterrence to ensure this doesn't happen
- Will Orochimaru acknowledge Hazo as a legitimate threat at any point in the future, and want to have any sort of insurance in place to prevent Hazo's political or destructive powers from being used against him later? Almost definitely, though this could take so many different forms it's impossible to address all of them, so we need to focus on the possibilities which are most harmful to Hazo and his goals.
- Possibilities that have been raised include mind control, emotion control, dependency, depowering, all of which become (hypothetically) possible or even just easier if Orochimaru has us on a surgery table
- Counter arguments are that surgery is already necessary, and that Tsunade or Hazo's future skills will be able to counter anything Orochimaru does to us
And basically... Nobody has the energy to think of every possible path forward and handle all of the variations that might come up. The fact that we need to counter Hidan's blood sense is unfortunate, because the argument that Hazo or Tsunade can or would even
want to undo whatever Orochimaru might be willing to do to Hazo is unconvincing. All Orochimaru has to do is whisper about the destructive power of Runes into Tsunade's ears and he might be able to convince her that Hazo is better off as an idealistic civilian (Or lobotomized assistant surgeon, lol) instead of being able to keep inventing WMDs every time some out-inspired nightmare strikes in the dead of night.
I guess, if Leaf has access to a portal to the land of the dead, and leaf's S-rankers are brought back, and there are those like Jiraiya, Kei and Naruto who are willing to keep fighting for the ideals of uplift, then I'm willing to take the risk of Hazo losing his... anything, really. His strength, his influence, even his life. Fact is that Hazo doesn't need to personally lead the world into a golden age, he just needs to show that path of peace to be possible which is what we're hoping this rift war might lead towards. Overwhelming military domination counts as world peace, right?