It didn't take a large amount of time for him to be greeted, which was something that he found himself feeling very grateful about. "Yes, it's Superman. It's nice to meet you as well, Luke," Superman responded, offering him a small smile of his own.
He didn't know who this 'Mantis' was, but he expected that the person was probably just another member of the group that they had running here. Maybe he was the one going to retrieve Cordelia and whoever else it was that Luke wanted to come and speak with him?