Board Thread:False Info and Speculative Discussion/@comment-5080035-20150814161939/@comment-13965604-20150824131324

I will admit that Danny has no reason to return. It was never said in show, but they gave the impression in s1 that Jackson, Danny, and Lydia were all a year above them, then they backdated Lydia into being their year. But I don't think they really confirmed or denied that Jackson and Danny did too. So, technically Danny can be said to be gone because he graduated.

Supernatural creatures though? They're always a possibility. And I'm sure they'll try and keep them under tight wraps about a return as long as possible.