So, there’s a console HD release of Resident Evil: Revelations coming soon. However, it seems that none of the updates and modes are coming to Nintendo 3DS, as downloadable add-ons or a new release.
Some of the features being added to RE: Revelations include a new difficulty level and new raid mode features. There’s also an entirely new character being added to raid mode, Rachel, a woman who desperately needs to zip up her jacket and get her hair out of her face if she has any hopes of surviving. None of these features are coming to 3DS, as revealed on the Capcom Unity forum, where Christian Svensson from Capcom addressed a question:
“Sorry guys, but there are no planned updates for the 3DS version of Revelations. We’ve added a fair amount of new content to the new edition which is fairly common to do.”
So basically, go buy the whole video game again if you want the new features.
Source: Nintendo Everything