A little devil's advocate or trolling (you choose)

What about the prospect that XIII-2 is coming out less than two years after the first one and the fact the game had several unanswered questions and constantly teased about extra content within the actual game through the analects. Does this not give the impression SE had the sequel planned from the beginning and purposely held back content to make this game rather than actually tell a complete story. What about other series that do so?