Two detectives, a rookie and a veteran, hunt a serial killer who uses the seven deadly sins as his modus operandi. http://www.imdb.com/title/tt0114369/
This title sequence would help me and my group because it creates a lot of enigmas. In our title sequence we don't want to give to much away. Se7en is a great title sequence for not showing away too much.
300
King Leonidas and a force of 300 men fight the Persians at Thermopylae in 480 B.C.
http://www.imdb.com/title/tt0416449/
This also will help with our title sequence as this brings a lot of enigmas. Even though it shows more than the Se7en sequence it still makes you wanting to know more.