These games have all been making a profit, serving a market, and spreading the talk of D&D. They will continue releasing them. And if you read through all the recent tweets from Beamdog, it's all but certain it's PTEE.
I wouldn't put much home in that translating into the next adventure path of book of crunch. None of the other realeases by Beamdog have yet.
Also, watch the latest acquisitions Inc from PAX East. They always align their story with the current adventure path, and the end of that is clearly foreshadowing the next adventure path. The next time they play, the next adventure path will be out. (The one after Tales from the Yawning Portal.) I don't think that foreshadowing reflected planescape. It sounded more like they're going to an area of the realms we haven't been yet in 5E than to other dimensions.