it would follow the pattern that all in the ride line prior to park closing would be allowed to stay in the line to do the ride
Exception could be the line is cut off earlier when the other park is closed
If the IOA is closed one or two hours prior to the studios, HE would close the line maybe 15-30 minutes prior to that
Those in the line that were allowed in it, would be escorted out of the park at ioa by TM once they arrived there