at the end armin thoughts are very important, he said " if a titan eats a person who can change into a titan and thus inherits their powers.. if thats actually true.. when and how did eren become a titan and who did he eat to gain his powers"
And thats a very important question bcuz we dont really know how eren became a titan. and since he have special titan powers.. how did he get them and how did he became a titan.... we dont know that yet
its getting more intense and from here is its gonne get wild so fasten your seatbelts