Girl on girl is already homosexual, silly =P
But seriously, I'm glad you're considering it. At the very least, with the addition of futa content, you could repurpose content made with futanari models for male models. Ie, if you have animations where the player bottoms, performs oral, recieves oral, or tops anally, that can be done with a model swap of the futa version of a given character, assuming the male model is similar enough and model swapping is possible with the infrastucture you have set up.
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You can make pretty girls for everyone. Making males attractive for the homosexual crowd is another thing all together. We will likely need consulting for it as it's not really something the dev team has experience with.
Yes we can reuse the futa stuff, but those for the most part are animations designed for female body types.