Honestly, I think the "gay agenda" has reached it's high-water mark. Or actually peaked a year or two ago.
Mainly because it isn't a "gay agenda" insomuch as it's a "Leftist Agenda". Always looking for a vehicle to cry-bully with, or a group to champion. And they've ridden that horse about as far as it can go.
I think the biggest single indication it's run it's course was the Pulse nightclub shooting, where the collective mind of the Left seemed to undergo a small schism, and then ultimately gravitate more towards battling "Islamophobia" as the cause du-jour. And within Leftist/SJW circles, there was also a rising tide of blather about "gay privilege" that under "intersectionality" gays were often "too white" and "too rich", associated with gentrification of the new hip/trendy urban neighborhoods and displacing the original poor people of color... or whatever.
Aside from "Islam being the new black" focus seems to be on transgender now. Which is an even smaller weaker horse, gays being about 3% of the population, and transgender probably well <1%. Especially if you only count the "real cases", whether you think it's real or not. I just mean the ones who at least think it's real for them on a gut-level, and aren't just doing it as a form of counter-culture protest or to be edgy. (Androgeny has a long history of being cutting-edge fashionable, from the high heel shoe being menswear for horses/stirrups being edgy for women, to mop-top haircuts in the 60's with the Beatles etc.)
In comparison, Islam has got legs.. there being a few billion or whatever of them in the world. The Left won't run out of Muslims to use as SJW cannon fodder for some time. If ever.
In the specific instance of The Beauty and the Beast movie, the whole thing seems to be a case of the religious or social Right needing to pick it's battles better. Just by picking up the issue at all, and letting the press run with it, they've lost that battle IMO. By criticizing or opposing it, they're generating "buzz". Invoking the theory of "there's no such thing as bad publicity". And having them "lose" if Disney's box-office receipts are big. Which they seem to be. And that weakens all of us where the fight belongs, like on the true libertarian/conservative issues of freedom of association and from association, like the "Christian bakers/gay wedding cake" type of issues.