With the Arrowverse's "Elseworlds" edging closer and closer to its early December release, stars of the series Smallville have met with Arrow's Stephen Amell, prompting rumors that they may, in fact, make an appearance in the crossover. The crossover episodes will incorporate alternate realities, not only allowing characters within the current Arrowverse to play against type, but characters who aren't necessarily canon in the series to play a role.

In "Elseworlds," the Arrowverse is introducing some considerable shake-ups to the status quo. John Wesley Shipp, who not only starred as the the Flash in the TV series from the '90s, but as Barry Allen's father in the current CW version of The Flash, will play the hero once again; characters like Lois Lane (Elizabeth Tulloch) and Kate Kane/Batwoman (Ruby Rose) are being introduced; and The Flash (Grant Gustin) and Green Arrow (Amell) will be swapping roles. Now, as if Superman (Tyler Hoechlin) wasn't already getting enough to do with a darker version of the Man of Steel showing up in behind-the-scenes photos, there may be some old-school Superman characters showing up in the Arrowverse, courtesy of some familiar faces from Smallville.

Related: How The Arrowverse Can Make Smallville Canon

Though there has yet to be any official confirmation regarding their involvement, a photo that Amell posted on his official Twitter account suggests that Tom Welling and Michael Rosenbaum, who played Clark Kent/Superman and Lex Luthor, respectively, may show up in "Elseworlds." The photo features Welling and Rosenbaum sitting across from each other, evidently tasting a selection of wines in a board room. Amell captioned the photo with this encouraging, but vague, text: "Pretty excited about this one..."

Despite the fact that Smallville essentially paved the way for the Arrowverse's success, they don't exist in the same universe. That said, given that "Elseworlds" is playing around with the Multiverse, there is room for unlimited crossover potential. It's been rumored (or, at the very least, has been a high hope among fans of Smallville) that the shows would intersect, and "Elseworlds" has so far been the best opportunity at making this happen.

It would hardly be unprecedented for the Arrowverse to include characters (as well as the actors who played them) from older shows. For example, Dean Cain and Teri Hatcher, who played Clark Kent and Lois Lane in Lois & Clark: The New Adventures of Superman, showed up in Supergirl. They didn't play their original DC characters from the show, but the fact that they were involved at all proves that The CW's creative team is interested in looking to the past to add some fuel to the future.

Arrowverse "Elseworlds" begins with The Flash on Sunday, December 9, followed by Arrow on Monday, December 10, and ends with Supergirl on Tuesday, December 11. All episodes air at 8 p.m. EST.

More: Smallville Spinoff Almost Followed Green Arrow & Lois Lane in Metropolis

Source: Stephen Amell