The CM blockout calendar for DL is out for May, but not the WDW calendar. There are no DL dates that scream 24 hour party. In 2015 & 2014 CM's couldn't even get themselves in on the 24 hour day, and there is nothing like that this year. Wed June 8 and Thur June 9 CM's can't bring guests in but can still self-admit. The mid-week thing seems strange, unless there is some other event going on those days. I suppose WDW could host one, but not DL.
Do we really know if the 24 hour parties are actually a major money-maker? I always figured that most of the people showing up are APs who aren't paying admission, and the staffing is likely a real operational drain. I was under the impression Disney did them more for the publicity.