I guess it's time for me to chip in...
As much as I don't want to say it, and as much as I know many don't want to hear it, I think the locomotive might just end up getting cut up. Since I can't see CSX moving the locomotive to a new home by rail, let alone putting that switch back in, and for the reasons Rich stated above, this is the most likely outcome for no. 643. The best thing anyone can do at this point is pay a visit to the Rocks and say your final goodbyes.
I hope a miracle happens...but only time will tell.