Have only seen a few brief pieces on potential redevelopment of this site at the Katy Freeway and the Beltway, however this is the first I've been able to find on something concrete.
Per bisnow...
http://www.bisnow.com/commercial-real-estate/houston/bisnow-exclusive-sneak-peek-at-block-10-west/
It deals with the conversion of the former Great Indoors store into office space, with plans to add a new 15 story building.
PDF of current plans from Hicks. This version says the office building will be 12 stories though. http://www.hicksventures.com/assets/pdf/Block10Max.pdf