The Army Reserve once had several "Training Divisions," whose mission in the event of a full mobilization was to train the thousands of individuals expected to be called up in a revitalized draft. I was in one of them, the 104th Division (T), for a few years in the late 70s. These units, or at least some of them, still exist but their mission today is to provide training for current Reserve and Guard soldiers.   Some of the bases where this training was to take place are now closed, such as Ft. Sheridan IL, and others, like Ft. Polk LA, have entirely new missions.

No, a return to the draft is highly unlikely. What is more likely to occur is a further increase in the deployment tempo, with less time between unit assignments to the combat zones, activation of the reserve components for one year out of every three or four, and an even greater use of "stop-loss," when a soldier scheduled for discharge/retirement is not allowed to do so because he/she whould leave a critical hole in a unit's organization.