Basically, they're every shade of cool and suggest that Carnahan would've done something really groin-punchingly special with Matt Murdock. I mean that in the best possible way.
In his bad news tweets, Carnahan used Serpico as a reference point, and it turns out he was being pretty literal. His version would've been set in 1973, in the grimy, crime-ridden New York of Death Wish, Taxi Driver, and The French Connection. Naturally, it would pit the blind vigilante against the Kingpin. The reels, which are only slightly different, establish the feel of Daredevil as sort of mock-trailers comprised of existing music, comic book images, and footage, which includes snippets from Mark Steven Johnson's unfortunate 2003 attempt and many a Seventies classic. Even if this weren't every shade of cool, which it is, it'd be worth watching to catch all the familiar shots.
Since the movie isn't happening, Carnahan tweeted, "Guys, I'd like a show of hands. How many of you want to see this DD sizzle piece? I'll post it to YOUTUBE if I get the necessary response." He followed it up with a decree that when he arrived at 6,000 followers, he'd tweet two versions. Those followers showed up right quick, and here are the sizzle reels. The first is the more violent one, while the second one is decidedly more PG-13. Both were edited by Skip Chaisson.
To be clear, Fox was apparently quite enthusiastic about Carnahan's idea for Daredevil, but that deadline for the reversion of rights to Marvel just made it impossible to move on with the project. For the rundown on that whole situation, click right here.
So despite being crazy-promising, this Daredevil isn't happening. The rights to make a another movie based around the blind protector of Hell's Kitchen are going back to Marvel, and since they seem to have the next few years mapped out quite thoroughly, we can't expect to see Matty Murdock any time soon. A damn shame, because a Carnahan-directed Daredevil could have been a thing of scuzzy beauty.