Does Tamahome ever come back to the real world?

yes if they can get prue back in it.

yes.....and.......no if yes terra came back in things change because when beast boy spots a girl who looks like terra he approaches her with excitement during the end beast boy tries to make "terra"...

Yes but no the reserriction stone can only bring back u as a ghost

We don't know yet, but there isn't much chance that he will. And even if he does, it won't be simple. The current plot has shown that Sasuke has no other goal but killing all of Konoha right now, so...