They could make a good sequel to T2, especially with what we meow know about AI. Also, the same applies to T1, as Kyle s
aid Skynet was defeated and the humans destroyed the time machine after he went through so there was no need for T2. T1 is a self contained story, T2 shouldn't exist.
A sequel to T2 could take place in a future where we find out AI, some form of Skynet, was inevitably going to be developed, as is the case in real life (AI not Skynet ha) even without a Terminator chip. There's a lot of places to go from there. We could see the labor camps and even go the route of The Sarah Connor Chronicles where the humans start looking for or developing a counter AI with the help of a defecting Terminator. Imagine seeing the future holocaust and labor camps and the reluctant resistance fighters being told they have to work with and protect a machine (which is kept secret from them at first, really splitting ranks), and the lead up of the machine reluctantly needing humans to defeat Skynet.
I agree that those future scenes are effective for that reason, but a movie starting in that future could be equally or more powerful if done right.