Geoff Johns in an interview with Buzzfeed actually explains that the DC Movies and the DC TV Series are indeed connected, "We look at it as the multiverse. We have our TV universe and our film universe, but they all co-exist.
DC Comics decided to get into the connecting movies after Marvel Cinematic Universe proved it could be done.
DC TV UNIVERSE: Arrow-VerseEdit
This Universe is based on the 2012 CW Arrowverse and the TV Mutiverse.
|EARTH 01||MULTIVERSE||POSSIBLE SHOWS IN THE MULTIVERSE|
|CW ARROW||EARTH 02: JSA||SYFY KRYPTON|
|CW FLASH||EARTH 03: CSA||GOTHAM|
|CW LEGENDS OF TOMORROW||EARTH 19: STEAMPUNK ERA||VERTIGO TV UNIVERSE|
|CW SEED VIXEN||EARTH 23: CW BLACK LIGHTNING|
|NBC CONSTANTINE||EARTH 28: CW SUPERGIRL|
|CW BATWOMAN||EARTH ??: SMALLVILLE|
|EARTH 66: 60-70'S CINEMATIC UNIVERSE|
|EARTH 90: 1990'S DC CINEMATIC UNIVERSE|
|EARTH X: CW SEED FREEDOM FIGHTERS: THE RAY|