When is Sonic Adventure 3 going to come out

No one nows.
But we can belive that it will come out in 2011 (Sonic 20 Aniversary).
It is currently unknown, but it is unlikely that it will ever appear, due to 10 years passing since Sonic Adventure 2, and still no sequel being made, but with Sonic the Hedgehog 4 on the horizon, it could still happen. It's been 17 years since Sonic the Hedgehog 3/Sonic & Knuckles.




This is all geussing but possibly sometime next year http://www.sonicadventure3.com has been up since past april. sega would have noticed by now