p1: The Nord pantheon is centered on Eight Deities, the same prime-Aedra found in most every Tamrielic religious tradition.
p2: Word of Tod is that the Ancient Nords worshiped dragons.
= The Eight Aedra/Divines/Aesir? are Dragons.
The most glaring hole in this argument (that I can detect) is that troublesome word Ancient. It may be the case that those ancient Nords were just savage lunatics who worshiped dangerous beasts before being converted to Aedra worship, but that seems unlikely. The Eight are universal in all faiths, dating to the Dawn-period, due to the common ancestry of all races from the Earthbones. Thus all (current) evidence points to the Nords having venerated the Eight since time semi-memorial. And if what Todd said was true, then it's reasonable to assume that the Eight (and possibly all the lesser ancestor spirits) are in fact Dragons.