Opening Ceremony’s Humberto Leon and Carol Lim spoke at WWD’s menswear summit today, where they were more than happy to talk about the following: (1) how well Kenzo is doing since they took it over; (2) how well Opening Ceremony’s own line is selling at stores like Barneys; (3) how much fun they’re having with collaborators like Chloë Sevigny, Spike Jonze, and Yoko Ono; and (4) how much fun they’re having in general. But missing from their dialogue was one very noticeable subject: the lawsuit filed this week by Brooklyn-based designer Haleh Nematzadeh, who claims Yoko Ono’s John Lennon–inspired Opening Ceremony line was actually a ripoff of her own crotch-handprint designs. (Indeed, her photo evidence is pretty convincing.) A rep from Opening Ceremony told the Post earlier this week that “Neither Yoko Ono nor Opening Ceremony comments on pending litigation,” so the subject was probably off-limits to WWD. But you know they’ll have to address it sooner or later.