The new Avenue North community in Fairfax is getting another restaurant. Developer Delle Donne & Associates recently announced that The Blackwall Barn & Lodge would open a 12,000-square-foot restaurant and meeting facility on the 80-acre mixed-use campus, formerly AstraZeneca’s property. The 400-seat restaurant, which will have a private room for up to 150, should open in fall 2025. “This is our first Titan Hospitality concept …