One post responded meaningfully, and it seems to be inaccurate. Look at the concept art. The large load building is directly between the front of Splash and Piston, not off to the side. The description in the post is based on wishful thinking. What’s more, the drop is far from the only spot on Splash that offers an elevated view of what is now the RoA.
Perhaps the concept art is inaccurate. It often is. However, this is a VERY rare case of Disney building a new ride on a plot that is currently surrounded on three sides by guest areas. We can look, right now, at the spot the Cars ride will occupy. We can almost circle it. There is not a lot of room to hide the huge load building or obscure the ride itself. Folks arguing that this won’t interfere with three of MKs major rides aren’t assuming , they’re wishing.