BvS opened with the 4th best single/opening day: $82,010,000. Just a couple million short of Age of Ultron's $84.4 M but slightly above Jurassic World's $81,953,950 and The Avenger's $80,813,985.
Good Friday/Easter Weekend Films
Scary Movie 4 - April 14, 2006 ($40 M opening weekend)
Clash of the Titans - April 2, 2010 ($61 M opening weekend)
G.I. Joe: Retaliation - March 28, 2013 ($40 M opening weekend)
Furious 7 - April 3, 2015 ($147 M opening weekend)
Batman v Superman: Dawn of Justice - March 25, 2016 ($171? M opening weekend)
Fast 8 - April 14, 2017
Ready Player One - March 30, 2018
Fast & Furious 9 - April 19, 2019
??? - April 10, 2020
Fast & Furious 10 - April 2, 2021
Cyborg is slotted in April 3, 2020 as April 10 brings it closer to Marvel's untitled May 1 film. Still, that's 3 weekends before any superhero competition, go for Easter Weekend. I'm sure some film will find a home there as Easter Weekend has quite quickly become a desirable and valuable weekend.