They're going to answer dippers name and what happened in the portal in the journal that's coming out this July. As for fords sweater, they answered that in the finale. He was hiding the photograph of him and Stanley, in short he was hiding a big heart and love for his brother. We can only imagine what happened to blendin though
ok so i have a theory is that gravity falls will have another episode (not the "last" episode) OR another season. WHy? well each episode gets another picture but but have two pictures left so what now?