Even though my previous Superman story involved Batman, it was definitely more Superman centered, with Batman toward the side. For my World's Finest, I'm going to have Batman as a main player, involve Selina in the plot, and introduce some secondary characters from the Justice League universe I haven't previously used as I start creeping toward a Justice League story far down the line. There will be repercussions from both Superman: Bold and Batman: Brave in terms of the Earth-JL universe I've authored, and hopefully we're going to have some fun with this.