Valerio Pennicino/Getty Images
One centre back who does look set to stay however, is the Brazilian international, Dante. From Gladbach late bloomer to full Brazil caps and a Champions League trophy, this has been quite a season for the defender.
Brought in last summer for around €4.7 million to address the immediate concerns of a vast void of quality between the two full backs, Dante has been a revelation at Bayern Munich by securing and reinforcing the defensive line and making the position his own.
With less than half as many goals conceded as second placed Borussia Dortmund in the league this year, this back line has simply seen no equal in the history of the Bundesliga.
An achievement that is made all the more impressive when we consider that the Brazilian has had three separate partners throughout the course of the season. From the young, promising Badstuber who picked up a long-term injury, the towering yet clumsy Van Buyten, to the technically gifted yet unstable Boateng, Dante has strived on with each for the greater good of Bayern Munich.
In quite the cliché-ridden manner, Dante does indeed live up to most stereotypes associated with Brazilian centre backs—quick, skillful and composed on the ball—but also bolsters a sharpness that has allowed him to excel against any opposing striker that Europe's best clubs have to offer.
Guardiola would be wise to build any new defence upon the foundations of this rock on defence.