It is possible, that Satoshi is/are reading all these bitcointalk contributions ... and although some pepole want him/her/them to come back, nothing happened.
Possible if he/she, they are still alive.
Tell one good reason why Satoshi should come back. (good reason = improvement of Bitcoin)
I don't know if there's a need for him to come back and surprise us. What he has done is more than enough already. Well, if he comes back and sees the project that he started is already big, he'd surely be proud of it.
No way of really telling if the person is still alive. When billions/trillions of dollars are involved, #STRANGE events always occur.