The Warlocks and Hunters have blink on Voidwalker and Bladedancer respectively. Obviously one is void and one is arc so it makes sense for the Titan's last subclass being solar damage would have blink. This is my prediction though but what do you think? (I'm hoping for Titan's to get blink).
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Why? Blade dancer it my fav class and I can not stand Blink. I use it because it complements the class well in PVP and is good for dodging incoming projectiles. Thats all its good for. You can not really jump with it. I have to switch subclasses every time I do VoG.