I had heard that bit about the Colossus, too, but I can’t find it. One person tried pointing it out over at SWNN, but it was a Starfortress bomber.
Another Easter egg that I haven’t heard referenced? On Pasana there was a familiar creature dating back to ROTJ, and more recently the Jabba’s Palace playset. Because I spotted a Jerba carrying a bunch of stuff at the festival site.