When Blu-Ray first came out, it was around the time DVD was VERY much hitting its stride and everyone was releasing Extended/Director's cuts of several movies. Unfortunately, a few of these were released on DVD but never made it to Blu-Ray Some of these included are:
...and I am sure that there are others. I would love for these extended cuts to make their way to Blu Ray.
Also, to my knowledge, the only place to get the extended cut of Ransom is on LaserDisc. Wished Disney would rectify that as well. :-)