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 Bandicoot, Crash Bandicoot 2: Cortex Strikes Back, Crash Bandicoot 3: Warped andCrash Team Racing
that's 4 crash titles
jak & Daxter, Jak II, Jak 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