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It'll be about Dory trying to figure out who she is and restore her memory.So, the title does still fit in that finding her is the plot of the film, just not physically like in Finding Nemo.
We'll actually MEET members of Dory's family.Well, why not?
Dory will end up in the Arctic.Considering the kelp forest, the presence of a beluga whale character, and the fact that Pixar execs changed the ending after viewing a documentary on orcas in captivity...
Dory's memory problems don't actually run in her family.We'll be shown where they actually come from.
Some of the characters will end up in an open ocean sanctuary.Until the filmmakers saw Blackfish, the movie was going to end with some of the characters going to a Seaworld-type theme park, but the ending is being altered. Perhaps they're going to end up in more of an ocean animal sanctuary where they're fed and people come to see them, but they can come and go as they please.
Marlin and Dory will become an Official Couple.