What If the Arrowverse universe was apart of the DC Extended Universe?

What would be like if the Arrowverse universe was actually a part of the DC Extended Universe? Here what are things that would has to happen:

List of Changes:

 * Green Arrow, Martian Manhunter, and Flash would be part of the Justice League film.
 * Green Arrow, Martian Manhunter, and Flash would has both appears in cameos in Batman v. Superman: Dawn of Justice.
 * Superman, Batman, and Wonder Woman would appears as guest stars between in either Arrow, The Flash, Legends of Tomorrow, and Supergirl.
 * Superman would become a supporting character in Supergirl.
 * Cupid, King Shark, Shrapnel, Bronze Tiger, and Killer Frost would be part of the Suicide Squad film.
 * Shrapnel would has become a metahuman rather than a serial bomber.