Yes, I would expect so. Rumors are placing the GTX 980 at +25% over the GTX 780 Ti but for only $500. The GTX 970 is rumored to be $400. If true, that leaves no room for a $500 lower performing GTX 780. Frankly, there would be no reason to get one anyway.
One caveat, when Kepler came out, the GTX 580 was still a $500 card, so it's not a given. What will be certain, is that you will have more options and better prices after Maxwell is released on September 19th.
http://wccftech.com/nvidia-announces-game-24-event-980-970-announcement/