I know it's standard procedure for channels in the UK to not set their schedules in stone until two weeks or so in advance, but that's not really going to fly with a worldwide simulcast. After all, other countries set their schedules sooner. Most American channels it's a month in advance at least. Hell, the big networks have already announced the fall premiere dates for most of their shows. Trying to plan this to meet everyone's deadlines will be enough of a pain in the ass. I don't know, sounds gimmicky. IMO, same day broadcast with everyone airing at a convenient enough time is the best way to do this.