NASA isn't planning to use the Delta V heavy for any manned launches. Several companies are evaluating different concpets for LV's at the moment, these include everything from Shuttle Derived DIRECT-esque LV's, to all-liquid HLV's, to man-rating existing EELV's, a descision on a launch vehicle will not be made untill late 2011/2012 at the earliest. LC39 will be undergoing some work very soon, including the current demolition of the Shuttle tower at Pad 39b, the crew access arm and white room was removed before the Ares 1-x launch in 2009, and the controlled demolition of the entire tower will take place soon. For the first time since Apollo, we will see a clean pad at LC39, as NASA will return to the Apollo style tower attached to the MLP. The Ares 1 ML, which has no use, is sitting next to the VAB, its an impressive thing, almost as tall as the Saturn V tower and sits on an MLP, but it most likely will never be used
The idea is to make LC39 a complex which can handle several types of rocket, there is a chance that we could be seeing a new ''arsenal'' of manned space systems with one government system in place, and several LEO commercial operators, ''new space'', to complement ''old space''.
The US space programme is about to completely change in the next decade, just as the Space Shuttle made manned
flight more diverse and useful, the future plans of NASA, including the redevelopment of KSC and Commercial Crew, will give alot of choice and options as to how you get to LEO, aswell as the capability of getting to destinations beyond LEO.
Remember, ''space programmes'' are a thing of the past, the next few decades is all about accelerating private manned spacecraft production (basically so the government themselves dont need to spend all that cash to get to LEO) and developing BEO capabilities (Orion and the new HLV) one step at a time. Its more of an American ''space industry''.