"Billions but not everybody is likely to want to go, especially not if they'd have to join the sort of place we'd design and make according cultural compromises. For instance, I assume killing and eating people will be illegal. I'm nervous about establishing communication - I'm not sure it'd be dangerous for them to receive it and it seems firmly established that my universe can't or doesn't reach outside itself and 'nearby' planes. We might have to be vague about the advantages of the Elendil. But figuring out a way to ask is better than just kidnapping people en masse."