The CW has made the return of Smallville's Tom Welling as Clark Kent and Erica Durance as Lois Lane in this winter's Arrowverse Crisis on Infinite Earths crossover event official. While according to the CW it’s unclear exactly how their characters will factor into the five-night crossover, the event "promises to reveal exactly what their versions of Lois and Clark have been up to in the eight years since Smallville ended."
“For eight years, Arrow has stood on the shoulders of Smallville,” executive producer Marc Guggenheim said about Welling’s reprisal. “Simply put, there would be no Arrow, and no Arrowverse, without it. So when we first started talking about Crisis on Infinite Earths, our first, second and third priorities were getting Tom to reprise his iconic role as Clark Kent. To say that we’re thrilled would be a Superman-sized understatement.”
Welling and Durance will be joined by Supergirl's version of the iconic couple Tyler Hoechlin and Elizabeth Tulloch while Brandon Routh will also return to the role of Superman, "seemingly playing a version influenced by Kingdom Come."
The CW added there is still plenty fans don't know about the "massive" Crisis on Infinite Earths.
The crossover begins Sunday, December 8th on Supergirl.