Capcom has revealed that the upcoming Nintendo 3DS title, Resident: Evil Mercenaries, will include a demo for another upcoming Resident Evil title, Revelations.
Mercenaries is essentially a combination of the the Mercenary Modes which appeared in both Resident Evil 4 and Resident Evil 5, but now with 3D obviously. It has no release date thus far.
Revelations is a full-on title though and it takes place between Resident Evil 4 and Resident Evil 5. Both Chris Redfield and Jill Valentine will be playable.