Marty, as Ryan explained at the time of the announcement, those locomotives will have diecast bodies with brass details. They were still marketed the same way as Lionel’s brass hybrids, but the company decided to use diecast tooling so that the bodies could be used for other models.
Also, because they were advance orders only, they are already sold out, so anyone who wants one will have to find a dealer that ordered extras.
Marshelangelo, if you are asking what the next effort will be, only Lionel knows. There is no advance information until Lionel announces it.