Not quite Jurassic Park, but I something I really hope to see in my life time is a Woolly mammoth.
This would be pretty different from the ferret project, as the mammoth DNA available isn't in good shape. It would require genetic engineering as well as cloning, and mostly consist of introducing mammoth DNA into Asian elephants a few genes at a time.
Thylacine is pretty special as far as I know, with it being marsupial (though perhaps it is easier that way because a significant part of the development is outside the mother?)