Darth Jello
Cheese Spelunker
there's no split. Link doesn't go back in time at the end of Ocarina, he and zelda simply become children. That's why Link has the Ocarina of Time in Majora's Mask. A Link To the Past was confirmed as the last game in the series by Miyomoto and by the game itself in the fact that Ganon is destroyed permanently, the master sword sleeps forever, Link has the triforce, Link is mentioned as the last of the Knights of Hyrule, and the Sacred Realm is destroyed. That pretty much ends the series.
The awesome thing that Twilight Princess did for the whole storyline is clarified what the hell the imprisoning war was, explained the intros to Link to the Past and Minish Cap, an pretty much established Minish Cap as the first game in the series, not to mention explaining where evil and monsters came from in the first place.