We were there a few weeks ago and saw an average of 30 minutes. However, if you want a minimal wait, the earlier the better. We rope dropped rock and roller coaster, then got on tower of terror, then headed over to see Chewie. So I think we got to SW launch bay about an hour after the park opened. The sign said a wait of 10 minutes for him which ended up being closer to 5 minutes. We also stayed to the right upon entering launch bay and went directly to meet & greets (bypassing the movie clip portion).