Ok, I just saw the Imperial officer icon (on the top right side of the game screen) right across the Emperor icon and clicked on it. I then summoned a decorator droid for it (it's a black astromech droid) but the droid didn't appear automatically. You would have to go to your VIP lounge to get him out.
But I've only met this decorator droid randomly once despite playing quite regularly, unlike the last two events where the decorator droids appear much more frequently. May have to spend bux if I want to get all the rewards (which may be what the devs are aiming for).
Anyone notice the decorator droids rarely turned up, at least compared to the past 2 events?