Something has been bugging me about the past 2 issues of this series. In the previous issue we saw the Iron Nail siphon the super soldier serum from Steve Roger's body, once again leaving him in his frail, pre-super soldier state. According to the current issue, it also apparently left Steve as an elderly man. Even if the super solider serum is responsible for Steve surviving all the years that he was frozen after World War II, it wouldn't account for him rapidly aging as a direct result of the serum being removed from his body, he would simply begin to age normally.
Could it be that the Steve Rogers that returned from Dimension Z isn't the real Steve Rogers at all but rather an elaborate clone and/or some type of Zola mutate? One that was so dependent upon the super soldier serum that when it was removed from it's system it began to break down on a molecular level?!