Well the supersons series may have been guilty of doing it first but he could have chosen to end their association albeit temporarily by Jon going to the future after their meeting without dragging Damian along with him. It is just going to lead to further humiliation for Damian. Bet Damian loses his temper and tries to fight the team and jon has to restrain him lest he gets his butt kicked by the Legion which results in him getting rejected and throwing a tantrum to showcase jons new found maturity.