The "Deadpool" franchise is named in Justin Baldoni's new lawsuit against "It Ends With Us" costar Blake Lively and her husband Ryan Reynolds. Here's why.

LOS ANGELES (AP) — “It Ends With Us” actor and director Justin Baldoni has sued his co-star Blake Lively and her husband, “Deadpool” actor Ryan Reynolds, for defamation and extortion on Thursday in the latest move in a bitter legal battle surrounding the dark romantic drama.

"It is not strange that Ryan Reynolds was named in light of Baldoni's theories in the complaint," a defamation attorney tells Yahoo Entertainment.