https://www.sonicstadium.org/news/games/the-chao-garden-will-return-only-if-sonic-adventure-3-ever-happened-says-iizuka-r2543/

Under the same logic Izuka has also stated recently that there will be no new SA because they want to focus on something "New". Describe to me a project that wasn't trying to be something new since SA 1 & 2, they are retarded.