Barry has dealt with a lot in the previous season. He had gone through so much and felt desperate and exhausted most of the time. And now, he suddenly came out of speed-force like nothing has happened. He is joyful more than ever, and it is not because that he is grateful to return to the world or Iris. It is something extreme. His attitudes, behaviours are so incongruent with the stereotype that I could recall. I've even thought about the possibility of our new villain to shape and control the actions of him. Iris seemed to suspect that he is not the fiancée who went into the speed-force couple months ago. I don't know whether anyone else have noticed that, but it is a disturbing issue unless it is something fictionalized. Besides, add something new. I don't want Barry to gain his confidence following an emotional talk anymore.