I did hear there was going to be a 2015 Wave kite from Slingy...based on 'Z' kite maybe?
Wow...that'd be interesting. Right now the Rally is the kite they market to wave kiters... If they amp'd up the Z (isn't that sold as a beginner kite now?) for waves, I wonder if they'd make some Rally changes to have it more focused towards something else.
Slingshot seems to take their time and watch what the market is doing before jumping in with a new platform. For instance, when some companies started making race specific kites, they didn't. They pointed out their products that were well suited for racing, but they waited...and...the race demand seems to have faded away once kiting did not get in the olympics. Same goes with not making race boards and I suspect we won't see them jump in with a foil board any time soon. So, as there seems to be an increased array of wave specific kites popping up from other vendors it'd make sense to have one now.
They have been successful keeping their kite lineup lean with 3 main kites, though. (I don't even know anyone with a Z?!?) So it is more likely they'd re-focus one of the three then make a 4th or 5th kite. (freestyle, wakestyle, wave)