If you can't read my handwriting, it says:
Can you hear me?
I don't know if you can hear me.
...I'm sorry.
You're broken.
We are still your friends.
Do you still believe that?
I will put you back together.Here be my theory m8s.
I believe that the kid didn't die, but was in the hospital suffering from a coma. We do know that this is the victim's nightmares, and we know he's in a hospital because sometimes flowers, pills or an IV are next or on your bedside table.
And I think that it isn't Golden Freddy (Fredbear) apologizing. It's his brother. Who was also the one who had the idea of giving the child a 'closer look'. He feels bad for his little brother and wants to let him know that he and his friends are still there.
Maybe this is the spark for Purple Guy?
Think about it.
The brother feels extremely bad, so he gives his little brother a second chance. He kills the children (when he's older) so he can have some friends.Perhaps this whole franchise was an act out of love.