Unexpected news stunned Jacque Vaughn on the morning of March 7. Two phone calls — first from Kenny Atkinson, then from Sean Marks — shook up Vaughn’s world. Atkinson suddenly was out as Brooklyn Nets head coach after nearly four full seasons, and Vaughn would work as the interim coach for the remainder of the regular season and any playoff games. “(It’s) nothing that I had scripted in my mind at any point, in the imagination,” Vaughn said the day he assumed the interim duties. “It’s been a little bit of a whirlwind. But it’s a part of who we are right now and we’ll continue to move forward.”