i always like the Terminator series (except the TV series)..and i think T4 will gonna rock cuz everyone is expecting TRoTF..while T4 is has a darker storyline and more realistic expansion and i really cant wait~

i doubt that

as far as i know
there will be 2 more series in terminator salvation. as John Connor himself already signed for a trilogy. it is believed that The Resistance will win the war in the third installment thus ending this Terminator franchise.
i watched it last nite an will watch it again anytime soon. i had fun watching it, i like Bale as Connor. the twist are good, well worth noting that it was more like an alternate universe since the events of T1, T2 and T3 where they changed the course of the story. T4 is just a kick start for the further 2 upcoming movies where Connor becomes the leader of Resistance. im enjoying the movie~and you should too~