Nah, the first two films function as mirrors to each other. Terminator presents a view of the future as an inexorable, inescapable clockwork; John Connor is destined to be the saviour of the human race, and nothing the Terminator, Reese or Sarah Connor do will prevent that from occuring.
Terminator 2 turns that on its head, by showing that the predestination paradox of the first film (in destroying the Terminator, Sarah causes the creation of Skynet) on its head. The future isn't set; they're not trapped in this cycle of destiny. And in doing so, by exercising free will in the face of the inevitable, John Connor becomes the true saviour of humanity, by preventing the apocalypse from happening at all. James Cameron is rather cleverer than people give him credit for.
And the Terminator story is finished. It should've ended there. But unfortunately, it's become a franchise, and the producers want a third film; the apocalypse has to happen not because of any great message the producers hope to convey, but because they need a future war from which Skynet can sent a Terminator back in time, so they can continue the franchise. T3's not trying to say anything about time travel or the human condition, it's just there to make money. Of course, the "inevitable apocalypse" briefly seems cool and "dark", in that cynical, adolescent way... but it utterly undermines the point of the first two films.
SG