Adding count-down for RT games

[NikEyX]

Would it be possible to add a count-down for REAL-TIME games before the game starts, but AFTER the client has opened the SC2 windows? The point being that players need to be able to full-screen and get their controls up, before they play. Maybe we could even display a small count-down in the client/chat that starts at 10 seconds or so?

I have big plans, so let me know if this is feasible ;)