Hi CarrieRene,
I don't have time to read multipart stories these days (and often I skip even the one-shots), but I would say that for the sake of your current readers, it would be better to finish what you are already writing than to start new stories. (The exception being if the new stories were quick one-shots.) If you are nervous about forgetting your new ideas, you could always write up a quick outline for yourself.
I do watch Flash, but not Arrow.
Joy,
Lynn
