the chances of anyone every finding him again are remote considering the vastness of space. the other problem would be no one can see him even if they do. he is still out of phase. which i always thought was kinda cruel because he still out there, just floating around (in game timeline).
It would need a clever story to make it believable.
then again its actually strange the Ro and Geordi who could walk through solid walls did not fall through the floor or get left behind the second the ship began to move anywhere.
The only way I could wrap my mind around the floor and moving problems with the plots is that maybe the Artifical gravity and Inertial dampners still worked on them, since they were only out of phase and not dimensioanlly transcendental