I don't think anyone reporting here has researched the alternatives sufficiently. Short term, those of us who own (well, rent with a perpetual license or otherwise have access to) Encore CS6, will continue to use it. In the meantime, we'll research alternatives.
Start here:
http://www.videohelp.com/tools/sections/authoring-bd-hd-dvd
Note that this listing shows an Encore "CC 7.0," which does not, of course, exist. I sent them a note.