How do you see Tony and Ziva getting together?

i think something bad will happen to one of them...like one of them gets shot...and the other one rescues them from that instance and is there with them through it all...like Ziva gets shot and tony shoots the guy that shot her and then carries her to a safer location, and then she realizes her love for him and him for her and...

I remember Brennan saying that it will be totally unexpected ... so I've no idea.