The tenants union representing residents of the Soap Factory Apartments said it’s weighing legal action against the city and real-estate developer Weston Urban, saying the two entities failed to provide relocation stipends by a promised Jan. 1 deadline. The allegation and legal threat is the latest wrinkle in a plan to raze the Soap Factory — one of downtown’s few low-cost apartment complexes — to make way for the San Antonio Missions’ proposed ballpark and surrounding development. In late December, the city of San Antonio issued a statement telling concerned tenants those who qualified for a $2,500 relocation stipend and had vacated the apartment complex would receive payment by the New Year.