Then why frakk it up like this?
A stand alone pilot might be a better introduction, but it sidesteps the Arrow audience as automatic initiates.
Because I'm mental, this is what would rock my world... Parallel stories.
Have the Flash pilot and the Arrow episodes filmed on top of each other so that the backs of heads are in some episodes that has the fronts of the same heads and vice versus... You know like in Back to the Future 2.