Ooh. Just did a research. I just saw that they actually played all together in some games... My mistake. In fact, I just saw late preseason games and this was pretty much what the prefered line-up looked like:
Neuer
Rafinha - Boateng - Badstuber - Lahm
Schweinsteiger - Luiz Gustavo
Robben - Kroos - Ribéry
Gomez
Just got to show that preseason games shouldn't be relied on. So, just nevermind, lol.