I only care about subtitles and numbering when they decide to change the style in the middle of a series for no reason. Stick with numbers or stick with subtitles or stick with whatever you started with.
If we get a Spider-Man: The Attack of the Lizard or a Pirates of the Caribbean 4, it would really irk me.
What I find strange is this new trend of adding subtitle to the FIRST film in the series. I guess they do that to leave absolutely no doubt that they want to pump out as many sequels as possible. I can't see any other real reason.
Pirates of the Caribbean: The Curse of the Black Pearl
Prince of Persia: The Sands of Time
G.I. Joe: The Rise of Cobra
I don't think any of these films' titles need to be this long.