@Scandy That already exists, the rpi2scart ... (A bit expensive the truth)
He thinks that I am alone, I can not launch so many projects at the same time.
I had an idea about this that you are telling me, so that it was not the same as everything I had thought of including in the design a box for the RPi in the form of a console, its connector scart on the back and the DB15 in front, with button of power and reset.
But it's just an idea.
@gkralicek2 If there are, I already have a prototype working.