At the meeting of the Riverbend Trinity Trails Neighborhood Association on May 26th, a representative with the TownSite Company discussed Greystar's plans to develop a new luxury apartment complex on White Settlement Road between Athenia Drive and Nursery Lane, at the current site of the Sunset RV Park. Greystar is the same developer behind Elan West 7th, and this proposed development would be similar, albeit only 3 stories tall given Fort Worth's requirements for MU-1 zoning (I'm not sure if this area has been re-zoned yet, but would be MU-1). This location is near Rivercrest Bluffs and Crystal Springs.
None of the information about the apartment complex, or adjacent two-story office buildings (see map), is currently online at this moment, but probably will be soon.
I have included a map of all proposed developments in the Riverbend/White Settlement Road/Castleberry High School area here.