This could be a great chance for WB to show off the iHD stuff.
There are 4 cuts of the movie.
1) The theatrical cut - Harrison Ford Voice over, no unicorn scene, tacked on happy ending.
2) The "European Cut" - Same as theatrical cut plus a bit more violence.
3) The "Directors Cut" - No voice over, unicorn scene, no tacked on happy ending.
4) The "Final Cut" - Hard to say, but likely a few extra scenes, maybe some cut..
They could put all on one disc by having a "main movie", two different sound tracks (with and without the voice over) and simply cut certain scenes in and out of the mix depending on the version you picked to watch.