“Are they key to rebuilding the Temple? Not so much.”
Maybe they’ll keep trying, until someone survives the effort. On their mock-up of the Ark, by the way, they didn’t make the cherubim correctly (darker world, this is). They look too romantic and beastly, as if they had little minds of their own.
https://www.templeinstitute.org/vessels_gallery_14.htm
Besides, no one’s going to think about the Ark (Yirmiyahu 3:16).
IMO, things appear to be almost weird enough but too quiet for the rebuilding. Maybe we should stop being chickens and pray for idiots everywhere to be motivated to start the shindig (Yechezkel).