Some might point to the fact that, since the Dark Nimbus never appeared in creator Akira Toriyama's original story, he would never have considered such a thing to occur in Dragon Ball Daima.

Keep an eye out for those as they are virtually the only way to obtain Flying Nimbus Medals. These events are the Kid Buu Dokkan, SSJ3 Goku Dokkan, Gogeta Dokkan, SSJ3 Gotenks Dokkan, SSJ3 Gotenks ...