No definitive ship dates available from Diamond for those titles. Each one, as well as the yet to be released earlier issues, all show a default ship date of 6/27/2018.
Usually March solicits ship in May. REDG would have to do some serious catching up if they expect to ship Wayward Legends #6 in May considering Issue #1 has yet to be released.
They seem to be continuing with their primary business of soliciting product. I don't know what the revenues are for simply advertising product that does not get released. Probably fairly modest.