ABC ‘s flagship series High Potential has found a new showrunner — and it’s a duo. Nora and Lilla Zuckerman, who ran the breakout first season of Poker Face, have been named executive producers and showrunners of the hit crime drama starring Kaitlin Olson ahead of its upcoming third season. They are replacing Todd Harthan, who stepped down in March after serving as showrunner for the first two seasons of the 20th Television-produced High Potential to focus on his new new series, Disney+’s Eragon. The high-profile showrunner assignment falls under Zuckerman sisters’ overall deal with 20th Television. Under the pact, they most recently wrote and executive produced the Buffy reboot pilot, starring Sarah Michelle Gellar, which did not move forward at Hulu .…