The 3-dimensional shot of the packaging in the Amazon listing has the spine saying it's and 8-disc set, and the listing itself says 10 discs. The listing is the one that's correct.
https://twitter.com/ShoutFactory/sta...21090347413506
As for special features, the only one seems to be "Power Progenitors", which features a panel at Power Morphicon from earlier in the year that featured Zyuranger actors.
http://blog.samuraicast.com/shout-fa...yuranger-dvds/