Hey people, calm down. I think that if it's possible Telltale will do it.
I think that the relationship between Lucasarts and Telltale changed after the new president came up.
Maybe the previous president granted and assured for another season -that's why the open ending - but new management screwed up everything and don't let them do another one.
I think that if TT can, they will do it.
And, after all, these 5 games are not the Telltale's last 5 games they will make.