Dual campaigns should be back in Resident evil 6  

Resident evil use to have dual campaigns, you can choose the character you want to play as, You also have 2 different adventures to experience, Its more replayable.

In Resident evil 1-You Have a Choice between Chris and Jill
In Resident Evil 2 you have a choice between Claire and Leon

but things changed and Resident evil became a solo Campaign type of game. As in you only have one character to play as.

In Resident Evil 3- You can only play as Jill and the other characters were just unlockables for mini games.

In Resident evil Code Veronica- You play as Claire through out the game but you will end it as Chris.

In Resident Evil 4 , You can Only play as Leon, Playing as Ada is only for mini games.

In Resident Evil 5-You can only play as Chris, You have to unlock Mini games to Unlock Jill and Sheva.

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I think its about time to Make Resident evil a dual campaign game again, Its better to have the ability to choose who you want to play as. 2 characters with 2 separate stories, 1 Male and 1 Female.