As for Transformers, weekend waits can be up to 2 hours at times, or consistently be over an hour. Weekdays make a huge difference as waits will only go up to about 45 minutes at the highest.
I haven't been to Cars Land yet, but my brother went yesterday and reported Radiator Springs Racers as already being a 90 minute wait at opening due to the early entry crowd. However, he got on in ten minutes using the single rider line so that might be something to keep in mind. I can't be sure, but I'm guessing that by August crowds will have returned to average summer levels at the resort (60-90 minute waits for the E-tickets on weekdays, up to 120 on weekends).
1) Annual Pass Holders have been given an early entry option. OPTION is the key word here. We have to make a reservation for a specific date to enter the park one hour early. And there is limited space. But of course those that use it are going straight to RSR.
2) FP are have been distributed completed between 2-3 hours of the park opening.
3) Rumors were stating that the wait on opening day reached 5-6hours. I haven't seen any hard proof of it (photo of the wait time sign).
4) On the Tuesday after opening (6/19) the wait time for the ride at around 6pm was 200 minutes (3 hours, 20 min).
5) Downtime - the ride has been experiencing some down time.
Since you're going in August, the majority of Annual Passholders will be blocked out. This ride opened with most of us only having two weeks to experience it before a two month blackout.
If you opt for single rider, expect about 30 min wait by the time you go. Standby will probably relax to about 1:30 by then. (We hope).
Interesting note, once the single rider and standby line meet at the loading platform, the wait from that point is nearly equal.
Look forward to visiting both parks next year.
Not sure if this really is an "answer", but I'd say the queue is what you'd think it would be.
I, personally, wouldn't say it's "super interesting" because it's a mountain range style environment. There are some things here & there, but it's not filled with a ton of "distractions" or cool extras. It really sticks close to it's theme of being in a desert landscape, so it's simple.
Now the rest of Cars Land, is where you'll find all the Easter eggs, and interesting attention to detail. There's a lot more to look at in the restaurants, shops, even walking down the "street" than there is in the RSR queue.
Walt Disney World
Tokyo Disney Resort