In fact it's purely the 18-135 STM...the 40mm pancake does not autofocus or auto-iris (yet).
This strictly was a way for Canon to tell ENG they had a solution in the C100, for everything but power zoom. It's apparently a good solution. Maybe I will even pick up one of those lenses with the 70D kit on a Xmas special. But it's not a parfocal lens sadly and it will be October before the firmware offering movable mag assist appears, which is our next chance to have e.g. the 40mm pancake supported. The 'cake would be good for steadicam AF use, nice & light.