Update: I pulled nuc today, 4 frames of brood, eggs, larva, and one frames of pulled wax for queen to keep laying in.
I put the new queen with girls in their cage, in between two frames in the top box and watched for a bit while I cleaned up. Everything seemed fine at first, then about 15 minutes later I pulled the cage out to check and there were bees trying to sting thru the netting. I remember last year, Riverbee, coached me how to do this. I'm thinking that the bees hadn't realized that their queen was missing yet, so this queen was an intruder.
So I brought the queen back into the kitchen and closed up the hive until tomorrow, and I'll try to introduce her again. I introduced many queens before and haven't actually seen this rejection before.
Does that sound like a good plan?