I'm really interested in seeing how these locomotives will come out. I've been a bit more into MTH's products right now, particularly for this model.
I still haven't seen any sight of them. MTH's site says the uncataloged deep blue version has been moved to a March 2018 release date (a month after the 2018 RailKing model is supposed to come out), so I'm assuming the cerulean version will come then, too. Although some dealers indicate a Summer release.