M. Elizabeth Winstead as Ramona

"Mary Elizabeth Winstead is in negotiations to star opposite Michael Cera in Universal's "Scott Pilgrim vs. the World". Edgar Wright is directing the adventure romance.
In "Pilgrim" Winstead will play the dream woman of a young slacker (Cera). But the only way he can win her heart is by battling and defeating her seven evil ex-boyfriends.

The project is based on the Oni Press graphic novel "Scott Pilgrim Volume 1: Scott Pilgrim's Precious Little Life", written by Bryan Lee O'Malley. Michael Bacall and Wright wrote the screenplay.

Marc Platt and Eric Gitter are producing along with Wright and Nira Park, who produce via Big Talk Prods.

The role could take Winstead ("Live Free or Die Hard") to leading lady status much the same way "Knocked Up" raised KatherineHeigl's profile when she was paired opposite Seth Rogen.Winstead is repped by Paradigm and Betty Winstead".
Source: hollywoodreporter.com
What a fun, sexy time this must be for Mr. Cera.