Anti-marriage fans need to accept that this isn't happening no matter how badly they crave it. Marvel still value the audience that appreciates Peter and MJ and the marriage concept, there is a movie coming out where they have a child, and they recently reprinted the Wedding Album, so new readers are always being introduced or reminded of that chapter in Peter's life. Some may even come to prefer that as they get older, and I already know of many former pro-BND fans who have.
And they'll also likely still publish marriage stories in AUs or in an idealised past to keep us happy and thus giving us no reason to shut up about it
Marriage hasn't gone anywhere, and that'll continue.