Well, not much I can say other than wait and see for the patch sadly really. As you've most likely seen, people with top spec desktop GPUs are having trouble, some even booting the game, so it could mean better for your card too anyway.
Also if that isn't enough, DX12 is coming with Windows 10 if you're getting that, which if Batman supports it (I think it is..?), should mean even more juice is being squeezed out of your card than usual. I remember reading about DX12 using integrated GPU for smaller stuff too, so lessening the load of the dedicated GPU, but again not sure if this is a universal thing or it will vary game by game.