This is actually one thing I often come across when reviewing missions and it's something that annoys me as much as seeing that old __cur_mp in the briefing title.
First you do
titlecut ["","black out",0.000001]
in the init.sqs, which will make the screen go black in 0.000001 seconds. This will make the player see it as it would begin as black, because of the very fast fade.
Then you do
titlecut ["","black in",5]
to make the screen apear smoothly from black again. Three seconds is smooth, five even smoother.