It should be interesting to see the comedy-oriented actor as someone as evil as Cicada, whose comic iteration had him leading a cult of followers who aimed to murder anyone The Flash had ever saved, with the weapon of choice being daggers shaped like the lightning that gave both Barry and Cicada their powers.
Given his American Pie franchise creds, Chris Klein is perhaps the most recognizable of the actors to take over as a major Flash villain.
(Except for Grant Gustin himself as Season 3’s Savitar, but that reveal took forever, so it barely counts.)
At least the trailer seemed to confirm the show is remaining faithful to that element.