"We could leave all this. No more metahumans. No more life-threatening adventures. No more powers. We could have a normal life; just the two of us. We can go anywhere and be anything we want to, just say the word and we'll go," I whispered as I held onto her hands, my face only inches from her. With a slight laugh and a smile, she answered, "Let's go."

What if, Barry Allen got over his infatuation over Iris and instead was smitten by someone he never expected, Dr. Caitlin Snow. One Day a mysterious Speedster clad in White and Yellow Lightning, appeared from the future, and He's from when they all never expect. (P.S I got inspired to make this by the amazing ButterflyBlueEyes from www.fanfiction.net and you can read her amazing Story titled "Scarlet Angels"

At the beginning of season 4, Barry gets out of the speedforce after a year, instead of 6 months. Caitlin returns with a massive secret.