That's the premise of this new fan art from artist BFHARTSANDSTUFF, who posted this creation on Reddit. The image shows Welling's likeness on a Luthor-
All the Luthor love comes from the recent announcement of Lex joining CW's Supergirl sometime after the upcoming Elseworlds crossover. Fans have taken to social media to nominate Rosenbaum for the role, which he played on Smallville, but now they just might have to consider Welling too.
Rosenbaum played the role of Lex Luthor on the hit CW show from 2001 to 2008, when he left the show, though he did return for the big series finale in 2011. During his time on the show, he delivered a beloved rendition of the character, who as opposed to the comics befriended Clark Kent in Smallville after Clark saved his life. The two would go on to hold a tenuous friendship as time went on, and eventually, they would become full-on enemies.
The part of Lex Luthor has been played several times on TV and movies. Luthor was played by Gene Hackman in the original Christopher Reeve Superman films, and
As for Welling, he recently returned to the genre in Fox's Lucifer, and will hopefully return next season now that the show has moved from Fox to Netflix.