Something interesting about the Nets that I just looked up. What to me would be their best starting 5, Harden, Irving, Harris, Durant, Jordan, have only been on the court together for 50 minutes this season. In that 50 min, they are +24.
I can't imagine they would be better with Griffin over Jordan so he will definitely come off the bench and likely not get a whole lot of minutes.
At least with the Celtics, there is a starter spot for him if he plays well enough.