It's pretty clear from a variety of things that they're going for the 'Ultimate' versions of all those characters, since they're considerably more believable for modern audiences. Which is cool, because Thor in Ultimates is a very interesting character. For most of the series, I really had no idea if he was just a delusional guy with a magic hammer, a delusional guy with very cool tech or you know, the NORSE GOD OF THUNDER.