At the world’s largest gathering of movie theater owners in Las Vegas last month, P aramount CEO David Ellison committed to a 45-day theatrical window and to releasing 30 movies a year if and when combined with Warner Bros. AMC Entertainment ’s chief executive Adam Aron , asked about that on a call after the giant chain’s quarterly earnings today, said, “We have had private conversations with Paramount for months and months at the highest levels” and “the passionate commitment that David made at CinemaCon in front of 5,000 people in the auditorium, he and the people that work for him gave the same commitments to us privately in the weeks and months preceding. And we believe him … We believe that he is fully committed to the promises that he made and fully capable of pulling them off.” Ellison, in a surprise appearance at Par’s CinemaCon presentation April 16, said he wanted to look exhibitors “directly in the eye” to promise the 30 films a year. “You can count on our complete commitment.…