1.0 is the original Swanson flick from 92
2.0 would be the tv series
3.0 is a film revival by Warner Brothers without any involvement by Joss Whedon or connection to 2.0

The new Buffy The Vampire Slayer has been written by someone called Whit Anderson and will be produced by Charles Roven of Atlas Entertainment, who told The Los Angeles Times' Hero Complex that a Buffy remake is not something he would have thought to do on his own.

wrote:

...but Whit's take is pretty compelling and a lot of fun, and it's interesting to see all of this re-imagined. This is a completely new reboot. Tone is extremely important and you want the audience to realize what is at stake and the peril is real, but at the same time what's going on should be fun and inviting and keep everyone engaged. It needs to be relevant to today, too, and that is what Whit has found a way to do.

Roven's remarks are the sort of Hollywood-producer-missing-the-point nonsense we rarely hear anymore, in these days where genre films and television dominate the industry. Most audaciously, Roven said, "There is an active fan base eagerly awaiting this character's return," plainly mistaking Whedon's role in Buffy's success to be incidental.

Joss Whedon's thoughts via twitter:
[quote="'] This is a sad, sad reflection on our times, when people must feed off the carcasses of beloved stories from their youths-just because they can't think of an original idea of their own, like I did with my Avengers idea that I made up myself.

I always hoped that Buffy would live on even after my death. But, you know, AFTER. I don't love the idea of my creation in other hands, but I'm also well aware that many more hands than mine went into making that show what it was. And there is no legal grounds for doing anything other than sighing audibly.[/quote]