According to a July 2009 author chat with Victoria Holmes(One of the writers, Erin is actually 4 ppl), there are currently no planned Warriors movies, and none under consideration:
“Oh, the fickle world of movie making, well, there are currently no Warriors movies in production or even under consideration. The economy is not in a state to invest in a rather dark animation about feral cats, apparently. I promise I'll let you know if there are any changes.”
Nor were there any TV program.
BUT, there are plays.
Written by Victoria, a play entitled After Sunset: We Need to Talk was first premiered on April 28, 2007. It details a meeting between Leafpool and Crowfeather after the events of Sunset.
Also, ther was 'Brightspirit's Mercy'. Brightspirt's Mercy is about Jayfeather, Lionblaze and Hollyleaf. After going to a gathering, where all of the Clans exceptThunderClan are starving, three cats from StarClan appear - They come with a message, the three young cats must help feed the other Clans.
Recently I DID find a web with fan animation.
link
It isn't the greatest animation ever, but very enjoyable.
It is made by the Taiwanese and Japanese, but voices are English.
Top two don't have sounds,(the you-tube links)and the ones with talking are the 3d part that says part 1 ...to part 5.
I'm sorry it is Chinese! Its all I could find.