It has been rumored for a long time that Carstens Publications has had some serious financial difficulties. If the rumor mill is to be believed, those financial issues have come to a head and the news isn’t good for model railroaders. I have heard from pretty reliable sources that the June issue of RMC may very well be the last issue published by Carstens.
The good news is that there is a party or parties who have shown some interest in the magazine and it may well resurface in the future. But for right now, it looks like it may be a while before we see any more issues of the publication.