User blog comment:RafetheBoy/What's up with supervillains these days?/@comment-27700324-20180117201031

All of them have their reasons. Malcolm Merlyn has a personal vendetta against the criminal element of Starling City on Arrow. Eobard had needed the Particle Acclerator. Slade wanted to destroy Oliver. Zoom wanted to destroy the Flash. Non wanted National City considering that it was a good starting ground for Myriad. As Fort Rozz was close by. Same with Rhea as her son was there too. Reign, we don't know however. It more has to do with trying to kill Supergirl so far.