This image released by Sundance Institute shows Kieran Culkin, left, and Jesse Eisenberg in "A Real Pain" by Jesse Eisenberg, an official selection of the U.S. Dramatic Competition at the 2024 Sundance Film Festival. (Sundance Institute via AP) PARK CITY, Utah – Jesse Eisenberg had not seen “Succession” when he was writing his new film “A Real Pain.” But his sister Hallie Eisenberg knew from years of watching Roman Roy that Kieran Culkin would be perfect. The film, which premieres at the Sundance Film Festival on Saturday, follows two very mismatched cousins, one anxiety ridden and rule following and the...