Hello All..just found this great site and I have lots of information to share!! First off, I know this area like the back of my hand having moved here in the 70's as a kid. My parents are still off Potranco outside of 1604 so when I come back home to check on them, ( I live in the DFW area now) I am just amazed at the growth.
First off, I just ran across a detailed drawing showing some of what is planned for the Alamo Ranch Marketplace just to the north of Potranco on 1604. I'll try and post a link for it later if I can. This shopping center should begin off 1604 and Alamo Ranch Parkway which is also the extension of Hwy 151 that will eventually lead to Hwy 211 further west. The shopping will extend from there up to Culebra Rd. The list of stores in the schematic (including the ones already mentioned) are: Costco, JC Penney, Marshalls/Home Goods (we have that up here and it's great), SuperTarget, Best Buy, Office Max, Ross, Ulta, Petsmart and Michaels. There are about 20-30 other retail areas that aren't labeled and with this area being developed by the same folks that did The Forum, it's a good bet that most of the stores will be pretty much the same as what's over there. A Barnes & Noble or Borders book store is expected along with about every restaurant imaginable!
The Alamo Ranch housing area will be a very large and beautiful community of different neighborhoods with different price points ranging from the 150s upwards to 500K. Someone mentioned it being another Stone Oak and you couldn't be anymore right. Many builders have signed on besides the ones most people know about. David Weekley Homes is planned to build there along with many more that haven't been announced yet. New roads are also being planned to cut through the rolling terrain between Potranco and Alamo Ranch. Grosenbacher Rd will be extended from the Westcreek area up to Culebra Rd where it should hook up with Galm Rd and continue on to Bandera Rd. Alamo Ranch area roads (Lone Star Parkway, etc) will be extended down towards the Westcreek area and towards the new extension of Wiseman Blvd that now travels from 1604 west to Talley Rd.
The shopping area near HEB Plus originally had a Lowe's planned next to it as you head down Potranco towards Ellison. Not sure if that's still a go but anyone can tell that there's more development coming all around the new HEB due to the available pad sites everywhere.
The shopping center being developed directly behind Bill Miller's BBQ is only in the first phase. It eventually will be extended up 1604 and end just south of Calvary Baptist. Academy Sports and Outdoors is tentatively planned to locate in one of the larger pad sites closer to the church once that phase begins (my Dad is thrilled)! Also, just north of Bill Miller facing 1604 will be fast food restaurants including Whataburger, Taco Cabana and a drive thru Starbucks. A Pei-Wei chinese restaurant is planned for that development too.
I have seen the schematics for the Super Walmart at Potranco/1604 and it's a very large development exclusive of the store itself. Large pad sites surrounding the Walmart tend to make me believe that a Sam's (among many other stores/restaurants) will locate there especially since Costco will be just a few miles up at Alamo Ranch Marketplace.
Santikos still has plans for the Granada Theater but IMHO, I think they are taking their time and waiting for more rooftops to be built in the area but I foresee building starting after the beginning of 07. It will be a very nice theater with restaurants and retail attached.
Further down Potranco at Grosenbacher, across from Ott and Luna, another smaller strip center is planned on the south side of Potranco. A Walgreens is platted along with about 3-4 fast food pad sites currently unnamed. Expect much more development at this intersection because a neighborhood named "Weston Oaks" is planned on the south side of Potranco extending from Grosenbacher west towards where Talley deadends. Upwards of 1500 or so homes are planned with a price point tentatively starting at the 150's and up. Far west Potranco will be populated with high end homes...Bella Vista is one case in point. Homes there are selling in the 300K+ range. Stevens Ranch and RedBird Ranch will be two very large communities straddling future Hwy 211 and will be very similar to Alamo Ranch. Both will have entry level homes but they also will have neighborhoods priced from the 200s-400s over time. I have a large map that shows this area of SA along with the proposed new communities and the amount of new homes planned in each. I'll try and find it and post sometime later. Much more is planned but I figure I better stop since this posting is quite long.

If I hear more about these and others, I'll be sure to post for you all!