Part of the reason we got Sabine's TIE Fighter in the first place is that the Rebellion has very few ships left of the correct size. I mean. They have since released the H-Wing and the Wookiee Gunship. Literally what new ships can they have for Wave 14?
I don't actually want Sabine's Defender. I tend to agree with the folks who don't like the idea of Rebel/Imperial mirror matches. Nor do I expect FFG to actually put out any kind of Rebel TIE Defender.
Which still leaves me wondering what new ships they can release after this...