Both of these new attractions sound great!
Now, to those of you who jumped on the opportunity to say how infeasible and unrealistic of an idea it would be to have an arm that moved the ride vehicle from one track to another, I think you should give WDI a bit more credit.
Who created an elevator that would travel both vertically and horizontally, as well as "free-fall" faster than gravity? No, not Willie Wonka - WDI.
Who put multiple centrifuges in a building and actually simulates a shuttle lift-off and space travel? WDI
Who built a roller coaster, in a "mountain" that goes forward and backwards in the same trip, and encounters the world's largest AA? WDI.
Not to mention...who designed and built the FIRST tube-steel coaster? WDI - with the help of Arrow Dynamics, Inc.
Don't forget flumes, water-propelled boat rides, wire-guided vehicles, interactive dark rides, etc - all perfected by WDI, even if they didn't patent the original.
So, having said all of that, I have firm belief that if ANYONE could pull off a ride that had a giant arm move the vehicle from track to track, it would be WDI. I'm not saying that's what will be used for either of these attractions, but nothing is impossible.