Well i was reading about Naughty Dog, one of my favourite devolopers and i noticed something familar 

These are the games they have made:

Crash BandicootCrash Bandicoot 2: Cortex Strikes BackCrash Bandicoot 3: Warped andCrash Team Racing

that's 4 crash titles

jak & DaxterJak IIJak 3and Jak X: Combat Racing

and thats 4 jak and daxter titles

and what was familar is that they produced 3 titles then a racing game.

Now they are making the Uncharted series and they have produced:

Uncharted: Drakes Fortune, Uncharted 2: Among Thieves

and what remains is Uncharted 3 and Uncharted Racing 

Can you imagine Uncharted Racing Lol 

Of Course That's Just My Opinion, I Could Be Wrong