@p The pretext of Lightyear is that it is the movie upon which the Buzz toy is based, the one the kid in the original Toy Story is a big fan of.

Therefore, since Toy Story is either contemporary to 1995 or perhaps even earlier - but absolutely no later - there is absolutely no way a children's film would have an overt lesbian couple. But even worse for credibility, the film is a complete downer. It would be like having a toy from Welcome to the Dollhouse.