From what I've heard (mostly from Jim Harvey) the sales have wildly exceeded WB's expectations and have way outsold the single discs. Season 2 and Superman are likely, while Batman Beyond and Justice League remain a possibility. These episodes are in production order with minor revisions. Some fo the part 1's andf part 2's were broken up in production but put back together here. Also a few were meant to come before others (say episodes with Harvey Dent before he becomes Two-Face)so they've been corrected here. But yes, unlike the Looney Tunes set, these are in order.