Here's why it's still difficult for Smallville to crossover with Crisis on Infinite Earths. 1 / 8
Smallville ran for 10 years and was the iconic predecessor to the Arrowverse. 2 / 8
Crisis will already have two Supermen: Tyler Hoechlin and Brandon Routh, who will play Kingdom Come Superman. 3 / 8
Smallville has a lot of actors and characters who directly conflict with Supergirl. 4 / 8
The Smallville actors may also be reluctant to reprise their old roles. 5 / 8
They would also have to explain Chloe Sullivan's absence, which would be a challenge. 6 / 8
The Arrowverse has purposely done the opposite of Smallville's 'no tights, no flights' policy. 7 / 8
Crisis would also not give Smallville a lot of screen time, and fans don't want to see that Earth destroyed. 8 / 8