I rode by last night. Encore is located at the southwest corner of 6th Avenue and F Street. The room is not finished yet but so far it looks...well...pretty. Maybe a little Ikea, but pretty. It is a small space, a'la Cafe Chloe or Farmhouse. They open for mock service next weekend and I believe you can sign up for an invitation on their website.
I am so tired of seeing empty storefronts in the Gaslamp so I hope they succeed.