Although, it's not really important, but out of curiosity, for your OPM Dub-Dual Audio release which version of the 720p HS release did your patches apply to: the original individual ones or the batched ones?
I'm getting kinda excited, but sceptical at the same time! Personally, the main issue for an archive release would be to find/create decent subs for the OVAs. Anyone who can cross that obstacle can do a pro work imo!
Second game tells a story about different characters, its the 3rd game that picks up where the first one finished. Thats why second season to Danganronpa is titled Danganronpa 3 The Animation. (Thats what I read anyway).