Aparantly they have a lot of unrelease content. They got matterials from Osaka and there are production pieces before final concept.
The staff of Japan was also very hands one, level per level on every game.
It is confirmend, yet again, that this is just the original three games. Nothig less nothing more, no DLC, no new nothing, no anything removed, no anything improoved now or ever.
I was mentioned that this collection was very important to Capcom JP and they were very maticulious in their examination of the project, checking everything in contrast to the original titles level by level.
There seems to be no plans to add any DmC related materials and no plans for DMC4 collectors that would iclude new weapons or such but there is the possibility, if there is enough interest.
The DMC3 SE Cheat is still effective but will not give you any tropies or achivements for the work you didn't do.