Now, however, with the legalization of gay marriage and “Transparent” and gay characters even popping up on the Disney Channel, the question is not whether “Will & Grace” is too inclusive — too ahead of the culture — but whether it is inclusive enough. At a time when Hollywood is under intense pressure to avoid stereotypes and to promote diversity from every possible angle, “Will & Grace” — once seen as the epitome of diversity on television — could actually find itself assailed for being behind the curve.

It’s about four privileged white people. The characters, in particular the plain-spoken and politically incorrect Karen, occasionally crack racially tinged jokes. Although the lovably uptight gay character at the center of the show, Will, played by Eric McCormack, is best friends with Grace, played by Debra Messing, he sometimes makes quips that could come across as misogynistic in today’s climate. In rehearsal for the third episode, writers had Will joking, “It’s all in the book ‘Men Are From Mars, Who Cares Where Women Come From.’”

How will swishy, stereotypical Jack go over? That character, however hilarious, made some viewers wince the first time around. Mr. McCormack is straight. Will the fact that he’s reprising his role earn him a pass from those who think gay characters should only be played by gay actors?

“I would imagine that there will probably be a bit more blowback,” Mr. Kohan said of the show’s politically incorrect humor. “But saying the most un-P.C. things has always been part of what makes the show funny, so I’m hoping we get away with it.”

Mr. Mutchnick added that he hoped that the show’s pre-existing fan base, “grandfathers us in to a lot of forgiveness.”