I'm sure the Clippers will renew his contract, he is the most consistent player on the team, and please, don't worry, let us not conclude yet, we've seen this in the first two games, we thought Clippers has no chance but they came back and tied the series, they still have 1 life, they can get this win for sure.
Kawhi is a big star and still on his prime so its so obvious that Clippers still needs his service, but the question there is does Kawhi will take the offer of Clippers? Maybe yes since its his hometown but if the other team will give a good offer and build a strong roosters around him then for sure we will see him in other uniform if Clippers didn't act good regarding on convincing Kawhi to sign another contract to them.
He chooses clippers for a reason, so I believe he will stay. However, I think there will be big changes on the lineup as other players might be traded to make this teamwork, maybe PG will be traded after this season if they will lose against the Dallas Mavericks, we should watch out for them that.
But, if the Clippers will win in game 6 and they will give a good fight in game 7, even if they lose, I believe the team will remain in tact, at least the star players. They will build this team like the Jazz did and they will improve to be one of the best teams in the league.