Opening sequence idea selection

Our group came up with some different ideas for the begining of the opening sequence, after discussing them we then chose our favourite idea. we kept in mind the conventions of the thriller genre and some of the feedback and results from the questionaires about what people liked about thrillers

1. Our first idea was that we started the opening sequence with the girl sophia in captivity but we felt that this would leave the audience feeling as if they knew what was to come and that it lacked suspense and excitement.
2. Our next idea was that we have a shot of the nanny and the uncle (the audience dont understand  who this man is when they first see the shot) on the phone and the nanny could say something like "its time to do what we have been waiting for, do it now " . I think this also lacks thrill and excitement and feel that this would not be correct for the beginning of  a thriller.
3. I came up with the idea of  filming the daughter in the house all alone and scared, we film her as if she knows someone or something is in the house so she searches the house and grabs a knife, she then locks herself in her bedroom and tried to call for the body guard but they dont reply. Then she tries to call the nanny with one of those phones which are on the wall and you press a button to speak to the nanny but she doesnt reply or the nanny sets her up and replys saying " someone is in the house and they are coming for me, lock yourself in your room  and wait for help, i will get you help" and then Sophia gets kidnapped (as planned by the nanny all along). I think this idea is a good idea but perhaps a bit too dramatic for the begining of the film.
4. The next idea was all our favourite:

The opening sequence will feature the nanny doing her daily routine ,sweeping the floor , tidying up sophias toys and doing the dishes it is her routine and consists of her going into the daughters room to wake her up to prepare her for her school day. She goes into the room, sees the daughter is not there, looks at her watch, waits a few moments which seems strange, she then drops a glass of water ( to create the illusion that she was scared when she doesnt see the daughter ), and she calls security on her special microphone ( that security people have ) and says "emergency emergency security at the gates do not allow any visitors in or out...sophia is gone and i think she has been kidnapped " Similar to the shot below!

• We will probably name it "Snatched" i thought the name would be a bit of a giveaway but i got outvoted by my group.