The announcement of a release date for Resident Evil Revelations came with a small nugget of interesting news: the first time a western branch of Nintendo has mentioned the upcoming Circle Pad expansion in a press release.
The official release mentions the attachment in passing, saying:
The game is also compatible with the new slider pad, a second circle pad with two more shoulder buttons, enabling you to interact with the environments in new ways.
It's interesting that neither Slider Pad nor Circle Pad are capitalised, whereas earlier in the same release the phrase "touch screen" is capitalised. Perhaps the above sentence was added late on, or Slider Pad could be a working title for the add-on.
Either way, it practically confirms we'll be seeing the attachment reach Europe along with — or maybe even before — Resident Evil Revelations is released on 27th January.