Most multi-realm alliances have either a religion or a guild that they coordinate at least their military movements and campaigns through. The Véinsørmoot is this at the very least. It will stay around, for sure.
In most cases, the guilds are led by a ruler, or otherwise a duke, no?
I'm not saying it's theoretically impossible. I'm just saying I haven't seen anyone express much interest in doing administrative work for the 'moot, which would be required if Vellos "moved on to other things".
And considering the amount of old religions I've seen crumble due to lack of priests/elders recently, I don't think people are getting any more interested in these things than before. Quite the contrary.
