"So," says Bella to Rúmil one afternoon, "a few weeks ago I told myself that if in a few weeks I had not come up with an actually good way to bring up a thing I would just mention it anyway on the grounds that if it came up somehow later and I had not done so that would be weird."
...they can keep "hope Sauron doesn't think of the possibility that Valar might have learned to lie" in reserve.
Okay, ballpark how long?
Well, they could discuss things with the peal on the network but they disabled wizardry so actually now they can't.
They can't be more selective about it? ...And this might not even stop someone from being summoned out of Valinor from elsewhere.
They did manage to stop Elspeth from teleporting by sorcery that one time, that thing might work.
They could do it to someone else and Boots could try summoning them.
If that takes a while somebody from the peal can just do it, it won't take long.
Okay. Elspeth will be right back, since she can't summon somebody from here since they disabled wizardry.
Pop pop okay they're going to try to summon Elspeth in ten minutes and the Valar should try to stop that but only until Elspeth says to let her go.
The summon doesn't work.
She pops in to inform Warp that the Valar have not e.g. decided to keep her forever or something, then comes back. While they are thinking of their good solution there is a wizard Sauron in a science world on an inhabited planet, so the peal is probably going to do something fast if they can think of anything, even if the Valar can't help that quickly. Do the Valar have, like, relevant resources of which the peal should be aware.
Yeah no if Sauron proves portable he's gonna die.
Well, "ran off to Warp, while Sauron" is not super reassuring by itself, but unfortunately most of the people they could quiz on the timeline are also Sauron and therefore dead now. They could as a formality ask a Thuringwethil or something when Saurons start doing things.