Is it possible to get the 'next meeting 'complication on top of the time-lapse watch face?
No. Watch OS 2.0 doesn't include a kit to make changes like that. You could get Xcode and make your own complication, but even registered developers don't get to make custom watch faces yet. 

You'd need to be Hermès and work directly with Apple to get that done on iOS 9 and watch OS 2.