Hard to tell what to make of your variation.
The databases show a number of fairly recent matchups using your line up through the knight's return to g8.
I feel like it's tough to give a fair evaluation here, because the variation shown relies pretty heavily on trading off the light squared bishops, and giving yourself that nice f5, light-squared post for the knight, once the opposing bishop isn't around to harass him.
But what is white's bishop doing on d3 to begin with? He doesn't seem to be serving any purpose there, just development for development's sake. It's a lot more common in the fantasy variation to delay development of white's KB until its strategic relevance becomes clear.
Standard attacking development, a la Be3, Qd2, etc., and you're a tempo or two down and looking down the barrel of a loaded gun.
I have found what I believe to be a novelty in the Caro-Kann fantasy variation.
Could someone who plays the fantasy variation give an opinion please?
This is a recent game I played in this line. However, after Nc3, I chickened out with e6.