We're still admittedly on the fence about 'Arrow''s upcoming 'The Flash' spinoff, even with favorable reactions from Comic-Con 2014, but we have to give it to the DC drama for swinging for the fences. In addition to a plethora of DC villains already lined up, 'The Flash''s first season has added 'Arrow' baddie Robert Knepper to reprise his role as The Clock King, along with yet another DC metahuman, and a stylish new trailer to wrap it all up in.

Per TVLine, Knepper's William "The Clock King" Tockman will pop up in episode 7 of 'The Flash,' paired with another as-yet-unrevealed villain for Grant Gustin's Barry Allen to run circles around. Knepper first appeared as the Clock King in 'Arrow' season 2 episode "Time of Death," but given the villain's obsession with timing, and various interpretations of the character over the years, one wonders if Knepper's comic baddie might take on more of a sci-fi bent during his time in Central City.

Elsewhere, we've also learned that episode 6 of the DC spinoff's first season will introduce comic character Tony Woodward, better known as the sentient scrap-iron villain "Girder." In the CW's incarnation, Woodward actually bullied Barry in the schoolyard days, but has since become “a grinning lunkhead who loves destruction,” and subsequently an “unstoppable force… who can transmute any part of his body into solid steel.”

Knepper isn't the only major 'Arrow' crossover to come, as Emily Bett Rickards' Felicity Smoak will appear in the fourth episode, building to a two-hour crossover event with either series' eighth episodes. Similarly, 'Arrow' star Stephen Amell's cousin Robbie has also signed on to play an incarnation of DC superhero Firestorm, joining such colorful DC characters as Kelly Frye's Plastique, and 'Prison Break' star Wentworth Miller's Leonard Snart, better known as Captain Cold.

Greenlit for (at least) 13 episodes, ‘The Flash’ also boasts among its cast Tom Cavanaugh’s Dr. Harrison Wells, Candice Batton's Iris West, Danielle Panabaker's Caitlin Snow and Carlos Valdes’ Cisco RamonJesse L. Martin’s Detective West, ‘The Vampire Diaries‘ star Rick Cosnett as Central City Police transfer Detective Eddie Thawne, and original ‘Flash’ star John Wesley Shipp as Barry’s father Henry Allen.

Of course, you won't see any of 'The Flash''s latest additions in the brand-new trailer from the network below, but it all makes the pilot look reasonably ... well, flashy. What say you? Are you looking forward to even more 'Arrow' crossovers in our future, or is 'The Flash' moving a bit too fast? Watch the trailer below, and tell us what you think of the latest additions!

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