"The Harvest Moon franchise, which has been around for 15 years, is one of the most popular franchises for the entire family. Very peaceful games. We are expecting to raise Project Happiness in the same way we raised Harvest Moon. I don't know how long it will take. We have a strong belief in ourselves that this peaceful, friendly game will have big potential to grow in the same way as Harvest Moon." - Yasuhiro Wada

It certainly seems that Wada wants Project Happiness to be something special, making for the opportunity of franchising. When Wada was asked about turning this into a franchise, he indeed said he hopes that's the case.