Chapter 1 - A solution

Barry is lost on Earth-38, and the 'superhero' of the Earth just attacked him, destroying his only way back home. Is he stuck here forever, and when he bumps into the seemingly timid Kara Danvers, will he become friends, or even more?
Was being sent to this Earth not just a mistake, but something orchestrated by something greater?
This is a remake of 'Worlds Finest' (Supergirl 1x18), but it will continue after that with a slightly different storyline.
You can adapt this if you want, I really don't mind, because then there will be more Superflash stories, and I rlly like reading superflash stories