Batman v superman is a go - Casting such movies

[Arthur Dent]

Harley Quinn = Reese Witherspoon (young apprentice to Poison Ivy more fun than slut to the Joker)
Poison Ivy = Nicole Kidman (much better than that Batman and Robin crap)
Louis Lane = Jennifer Connely
Catwoman/Selina Kyle = Ashley Judd (Already chosen for the Catwoman movie)

For the Superman/Batman movie, they should really do a Joker and Luther team-up story. No Robin or any other villain. Maybe do a comparison of the Kent/Louis and Batman/Catwoman relationships.