Much as I liked what the first "John Carter" trailer was implying, the buzz since then has been shaky - fans who got a look at a sizzle reel during D23 were largely underwhelmed; and the suspiciously expection-lowering-esque "leaked" reports of budget runovers and the ongoing issue of the title (WHY can't they add in "Of Mars" again?) haven't helped. I want this to work, but I'm not getting that same "holy shit, they NAILED IT!" vibe the first "Lord of The Rings" trailers had.
This new one... is a step in the right direction. I'm still coming to terms with the decidedly un-Martian look of Mars (I'm wondering if they intend "I'm on Mars" to be some kind of surprise-reveal?) and the practical/semirealism look of the the tech and creatures... but that's an expectation thing, I think - adhering to either Burrough's persistent "going native" fetishism OR the gloriously-overblown Frazetta paintings that have defined this franchise visually for so long were never really options for a Disney actioner.
At this point, my bigger worry is that it doesn't look all that much "different" from Star Wars or a dozen other similar offerings, which is problematic considering how 'traditional' the narrative is by now. That said, the use of Led Zepplin (which couldn't have been cheap) goes a long way toward giving the whole thing a very "ostentatious album-cover" feel, so we'll see.