I'd like to think the story about the devil is true but not in a magical sense.
It may be a placeholder for the character who is the real devil, someone not revealed yet and perhaps the first titan.
I guess we will get to see the nature of the new shifter now. (if he becomes colossal or not). Maybe their traits aren't passed down how we think they are.
I saw it coming but I'm still disappointed that it happened like this. :|
Maybe we'll get a definite answer about the serum next chapter. There are quite a few candidates to get it right now and it is prime time to take control of R/B powers.
Perhaps we will see it wasted on Armin.
I wonder what the significance of the neck ties is.
Mumei uses a ribbon and Ikoma has his collar. I feel it might be a cue like when eren bites his hand
I'm getting that feeling that a 3rd party(maybe some shifter allies that are not introduced yet) is going to interfere in the next few chapters.
Or the Survey Corps will need to do some heavy recruiting.