Barry can just run Kara and Cisco back into the near past before the aliens pillage their Earth, bing bang boom, no harm, no foul.
So imagine my disappointment when Barry and Cisco (Carlos Valdes) finally do show up and it’s for barely a minute at the end before (presumably) Kara gets whisked to Earth Prime.
Not sure what cool things Barry and Cisco could do while in the embrace of National City?
Why not let Cisco and Barry exist in this space for a while?