I've heard that Yates has stated that there was roughly 45 minutes cut from the fifth film, yet the deleted scenes only amount up to about 7 extra minutes of footage.

I'm guessing that there's a lot more cut from the first four as well as 6-8 as well, and I really hope that WB releases these scenes.

Barring the final film, which without credits fell under 2 hours, I'm assuming that 1-7 all would theoretically have 3+ hour runtimes, which the later films really need considering how much was cut out