According to SyFy's schedule, they have WWE Smackdown announced for July 3rd, 2012 as their next "live" special.
Also, WWE has updated their site and announced this as a "Super
Smackdown Live" program for July 3 in Corpus Christi, Texas. Scheduled
to appear at the show is John Cena, among other top superstars from
Smackdown.
It should be noted that this looks to be a 4th of July special that will be replayed Friday, July 6th at its regular time slot.
Aside from this being live there seems nothing "Special" about it as there has been Stars switching between both shows for ages now.