Apparently dnd-next was the working name of the project.
All of the branding simply shows it as "D&D":
" while there are some open questions still, this is concrete news that Dungeons & Dragons (no longer Next, or even 5e, just Dungeons & Dragons) is coming soon."
... So do we tag it as 5e, or retain "next" or what?
According to this:
... and apparently "ampersand":