I've refrained from posting anything on this topic, because it has been so rife with rumor and hearsay. But with an official release, I believe this one is coming to pass:
http://www.railresource.com/content/?p=7144
Note these are C4s, not the dual-fuel LNGs which have been discussed. GE has had little success attracting orders for this model (the middle axle on each truck is not powered), and they are Tier III, which will be obsolete for new locomotives at the end of this year. That adds up to "fire sale" in some minds.
Either way, looks like 2014 will be a year of big change for the FEC.