The one thing that was mentioned at the Funimation panel of interest is the Dragonball GT Season 1 set will be 5 disks.  Since the set is 32 episodes and the solicitation info at quite a few stores said 3 disks people started to get a bit worried about video compression.  5 disks should be fine for 32 episodes though, let’s just hope that like the trailer shows, lets hope these episodes aren’t cropped like DBZ was.