If you watch football very few times does the announcer try to predict the play.
Predict is a strong word, but they do take various guesses. Remember the rule of 3 is “tell them what they’re going to see”. So when the announcer says “the defense is showing blitz” that’s a trying to tell them. When they say “this is probably 4 down territory so they don’t have to get all the yards on this play” that’s trying to tell them. When they say “the great part about 2nd and short is it opens up the playbook, this is a good time for play action”. Now some guys are really good at it, Romo straight up predicts plays.
When you look at how the rule is used in scripted TV you can see how pre-play announcing works with it. Like when Columbo gets halfway out the room and then turns around and says “there’s one more thing I want to ask” we know he’s going to ask the big question that blows the case open. Tell them what you’re going to show them. Then he asks the big question and maybe we cut to a glass or phone or whatever. Show them. Then he works on that answer and starts putting it all together. Tell them what they just saw.