Robert killed Rhaegar because he was distracted by his visions.

Honestly that's hilarious. I love the idea that Rhaegar sees the battle before him, sees how the battle is going to go, and begins to mimic it... only to be smacked down by BOBBY B.

Both Rhaegar and Lyanna have prophetic visions about the Song of Ice and Fire. They share a vision of Daenerys and her dragons.

Have Targaryen's shared dreams/visions before? Have non Targs, other than Bran, had visions?

Also interesting that they see Daenerys and not Jon.