Tyler Hoechlins Superman could happen but not yet   Supermans appearance on CWsSupergirl has created quite a buzz and has been well received by fans and critics. This has led many to wonder if a standaloneSuperman show could be possible in theKreisberg and Berlanti universe of DC universe TV shows. When asked by Comicbook.comabout this Andrew Kreisberg stated:  Im not going to sit here and say that theres never going to be a world in which there is aSuperman TV show and that Tylers going to…