Yes, it is possible.
There are several instances where cancelled shows have been revived. Family Guy, Beavis & Butthead & Futurama to name three.
Arrested Development can be half counted, it is being revived for one season but it will be on Netflix.
Boondocks is another that returned for a final season, after years off the air, although that may not have been officially cancelled as the others were.
However if you're asking can the average person get a cancelled show back on the air... No.
It's possible.
No its not possible i think
The show will come back on Sept. 2015.
Are you for real, NO!
what tv show Pokemon she had to go back to her town
the show has been cancelled
No amount of signatures can bring back a TV show once it's cancelled. Online petitions have never successfully brought back a TV show. What might bring back a TV show could be a kickstarter / crowd funding effort. It worked for Mystery Science Theater 3000 and it brought Veronica Mars back as a movie.
yes it will be back on tv this summer
Not the tv show voice.
George Washington didn't have a favorite TV show because they weren't invented back then.
I have heard rumours of a possible Spyro Movie, but I never heard of a TV show. And a show sounds unlikely to me anyways (though it would be cool).
The Tracey Ullman show, back in '89.