So I have been wondering about colossal titan just disappearing that easy.
My theory is that it has to do something with titan taking a human form.
So i think that Eren's father is a doctor and had his own basement that he kept locked and that he injected something in Eren.
I believe that the new titan is Eren because it is pretty obvious of looks and that colossal titan is maybe his father.
Because of that injection Eren was able to control the titan i guess so maybe Erens dad is behind all this ?
So what you guys think is it possible ?
Please don't spoil anything, because i haven't read manga.