ABC's version would be a spinoff from "Once Upon a Time":
http://www.hollywoodreporter.com/live-feed/once-a-time-mad-hatter-423603
NBC's version is billed as a sequel, but with a twist:
http://insidetv.ew.com/2013/01/29/nbc-alice-in-wonderland-sequel/
There would've been three, but The CW's "Wunderland" pilot was not picked up.
http://www.hollywoodreporter.com/live-feed/once-a-time-mad-hatter-423603
NBC's version is billed as a sequel, but with a twist:
http://insidetv.ew.com/2013/01/29/nbc-alice-in-wonderland-sequel/
There would've been three, but The CW's "Wunderland" pilot was not picked up.