Not only is the art "likely to change," but I'd like to point out that with regard to DCAU DVDs, this has been the rule, not the exception. In fact, if memory serves, EVERY BTAS DVD they've released (all those 4-episode single-discs), as well as EVERY JL disc, has appeared online initially as an "early" version of the artwork followed by a noticeably revised version several days or weeks later. So actually, what would be unusual is if the artwork didn't change, since it basically has nearly every single time in the past.