There really was a Sonic Movie...in '99!
 

I just finished reading Zero's thread and headed over to the imdb and found there really was a Sonic movie made back in '99. Here's the proof: http://www.imdb.com/title/tt0237765/

That was 3 OVAs patched together in english and put on DVD and Video ( It was actually made in 95,)

And if you read the rest of the thread, you would've read Raph's Girl's post which pointed out the same thing.