I doubt we will see that KD and Westbrook tandem but well, Thunders knows how to find talents before but sadly they didn't became champs with them.
That's why they are planning to rebuild again, there are young talents that might come and lead the team to more success.
No team can make a player to stay forever, though westbrook is no doubt one of the best player in the NBA but he is not a good example of a team leader, and we all know basketball is a team game and not only a one man game, so even with his very awesome triple double stats its still useless if he cannot lead his team to be in the NBA finals and to win.