A new master-planned community is in the works for Mont Belvieu. It will be located on the intersection of FM 565 & FM 3360 In addition to housing, the developers are working to develop a town center, starting with upgrades to the existing municipal campus and the aid of city government.
HBJ article: Master-planned community Riceland could triple Mont Belvieu population in Chambers County - Houston Business Journal (bizjournals.com)
Rendering from article
Also found a bit about the plan for the integrated and updated civic complex from the architect's website. Some renderings....