No I think Inglis would have a shot at an NRL contract if he played games over here and looked like he was trending in the right direction. He has a big reputation over there and he would provide presence in the dressing room and be a big name to attract media attention, so if he was reasonable about wage demands he would get something.
He's not too old - Langer went back to Aus at this age after a spell with Warrington - its just his fitness/injury status. And also whether he feels its worth putting his body through another year of being bashed about by younger guys.