Spoilers!
Lots of questions!
Anyway, Leo's good ending and Carl's good ending are the best. There is no happy ending.
Flynn's route is not yet finished, they are still going to add the epilogue.
I think Flynn was hallucinating and walked into a fire and died, but the entities in Echo used his body to create the time traveling monster.
Five years later Chase returns to Echo to help out some guys making their own ghost investigation. Its the Real Chase.
TJ's route! Well um Chase killed Sydney, and nobody believed what TJ said he saw.
Afterwards its not tolled what happened to the others....
I still feel bad for Leo, he ends up so depressed!