The time is given as "at the start of Toonami" which is 6pm CST, if that time information is accurate. The entire program is just ONE MINUTE long.
Though I will attempt to catch this on my DVD recorder, I plan to just S-VHS record the entire block of Toonami, from like 5pm to 11pm, 6 hours worth, so I don't miss it. Maybe timer record on the DVD recorder hard drive.
This was announced in this month's issue of LEGO Magazine (which is free, if anybody wants one).
More info on the Batman Lego toys:
http://www.toymania.com/columns/buil...gobatman.shtml