My thoughts are that I can hook up my transceiver into one of the lights, coming out of the dmx out. I HOPE it then received the DMX signal from it's internal antenna and re-broadcast via the hooked up transceiver. Again .... I've not tested it and don't know if it works. Just hoping. But, like I mentioned, I'll probably never need it, but would like to be prepared if so needed.
Yes, that's exactly how it would work. If your light is receiving a DMX signal wirelessly and you have something plugged into the DMX out jack on the fixture, it will pass the DMX signal through just as it would if you were using a wired incoming connection. For most practical purposes, you'll never need to do that, but it does come in handy in some situations, like if you put a truss totem and moving head on the opposite side of your dancefloor.