Capcom has not confirmed any expansion for Resident Evil Village yet. However, the game does have several DLC available, most of which contain extra content for players to use in the game.
For the Trauma Pack DLC though, which is included with the Collector's, Deluxe, and Complete versions of Resident Evil Village, there is some interesting artwork included. In particular, these reveal Capcom's initial plans to include a fan-favorite character in Resident Evil Village. Is Ada Wong in Resident Evil Village? Had initial plans pushed through, this would've marked Ada Wong's first appearance in a Resident Evil game after the events of Resident Evil 6.
Ada Wong is a popular character in the Resident Evil franchise. The unnamed female spy first appeared in Resident Evil 2. Since then, she has been prominently featured if not alluded to in subsequent games. However, following the events of Resident Evil 6, fans haven't seen much nor heard of Ada Wong, with Capcom not mentioning the mysterious character.
As it turns out, fans would have received an "update" to her whereabouts in Resident Evil Village had the initial plans pushed through.
According to the artwork gallery included in the Trauma Pack DLC, The Tragedy of Ethan Winters Artwork, there is a set of concept designs showing what Ada Wong would have looked like in Resident Evil Village. Instead of wearing her iconic red dress, her planned appearance in Resident Evil Village would have mirrored that of a gothic plague doctor.