Of the many cancellation atrocities committed by Fox, the termination of Arrested Development is one of the worst (next to Firefly).
After nearly six years off the air, the Bluth family is returning with new television episodes and a movie, with their very specific brand of uncomfortable humor. In doing so Arrested Development will join the ever-growing list of excellent shows that Fox prematurely cancelled, only to bring them back in some form. That list includes:
- Firefly
- Futurama
- Family Guy
“Series star Will Arnett seconded Hurwitz’s pledge on his Twitter feed, @arnettwill, while, er, standing next to co-star Jason Bateman: ‘I’m peeing with @batemanjason at the moment … and we can confirm that we are going to make new AD eps and a movie.'”
Maybe one day we will see new episodes of The Tick, Dollhouse, Human Target & Terminator the Sarah Connor Chronicles… But I’m not going to hold my breath.
At the moment, Fox isn’t confirming the resurrection of Arrested Development. If this doesn’t happen, I will be pissed.
(Source)
The Geek Whisperer 
We’ve been teased about this a lot, so I’m not holding my breath, but this is really good news.