Summary of opening sequences

Throughout the 5 different opening sequences i found that most of them had variations between them. for example deadpool, Real steel, inside man and blade runner are all quite similar, this is because these codes and conventions are usually found:

• Production companies 
• Distribution company 
• Establishing character 
• Key actors 
• Film Title 
• Key casting
• Producer 
• Editor 
• Music By
• Establishing Location 

Where as in Edge of tomorrow ive found that theses codes and conventions were found:

• Production companies 
• Distribution company 
• Establishing Location 

From this i can see that not even opening sequence can and will contain as much detail about the crew and directors and people like that. But from this i can also see that production companies, distribution companies and location and/or characters are established and shown in the opening sequence.