I just aquired the turbo sub set and wanted to convey some of the questions I had answered and observations.
The atlantis key piece; it has a 1x1 cylinder like connection on the bottom with an ability to turn an axle but not grip to it. It will connect to a stud or between 4 studs.
The diver's headgear is compatable with the astronaut's chrome blue and gold visors.
Shark warrior has some atlantian patterns on top of its head and has a lateral hole within his mouth in wich a lightsaber blade shaped piece may fit.
There are a couple 1x3 smooth red plates in the sub set.
When flipping the sub's mechanism, If you dont lock the clip to the handle pieces it moves quite smoothly... but once you do lock them in, it does become a jerky maneuver to release it.
Btw, the turbo sub was the only set available my area of Kansas City so far but I will "collect them all!"
I can't wait for a manta warrior set so I can see what if any secrets he holds under his mantastic head.