Perhaps just like the new scents they could add dinosaurs traps, you can set one up in a location (perhaps somewhere you only visit once in a while) and have it catch a random dinosaur! And you get some DNA from it!
Maybe you could combine the trap with a scent (common scent, Rare or Epic) and it will catch one of that rarity!
Maybe have set success percentages (put these % on it so we know the success rate) on whether it will actually catch a Dino or not! That way its not 100% guarantee that it will catch an Epic for instance, but a chance!