Last year was a rough one for restaurants at Rockville Town Square — but things seem to be looking up for 2015. The big news this spring is the still-unnamed restaurant from famed Chinese chef Peter Chang, opening soon in the former Taste of Saigon space on Maryland Avenue. Meanwhile, two more eateries have announced plans to open over the summer. First up is Samovar, a new venture from a father/daughter team that currently handles catering for the Tajikistan Embassy in Washington. They’ll be renovating the former Cosi space on North Washington Street, with plans for a menu of Russian food with Central Asian influences. Also on the way is Miso Cafe, a Korean/fusion restaurant from Annandale that’s opening its second location in the former Pho & Rolls space on Maryland Avenue.