Really interesting question. I like DAN (nice tie in with their system) and UND (nice tie in with their past). They specifically mention international and wonder what message is. I am wondering if they are going to an .org instead of a .com, since it is not under US Government (ultimate) control any more. It also finds use in some blockchain related uses, which ties to DAN and future trends.
I looked at owners of DAN in org (a diving group) no sign of movement as well as UND in org. So I don't think it is directly one of those.
They talk about it being brandable, so I wonder if they start with DAN but add something like idan or dano or dani. My prediction is something including but not only DAN and in the .org extension.
Bob