Garner kicked butt as Elektra and Ben Affleck played Daredevil before donning the Batsuit in "Batman v Superman: Dawn of Justice", reported People magazine.
"Oh, there is going to be Batman mania at our house next year," Garner said of Violet, 9, Seraphina, 6 and Samuel, 3, getting ready to watch their father save Gotham.
"But right now, it can go from Batman, to Iron Man, to Spiderman, to any of them," she added.
Garner, 43, is using her power as a public figure to help save lives outside of comic books, joining Neutrogena's Choose Skin Health campaign.