If for some reason you wanted to (re)watch the stinkers listed in my Blastr piece "12 disastrous movie sequels we wish didn’t exist to spoil series we love," I’ve done the work for you and found which ones are available via streaming. Lord knows, you wouldn’t want to be caught actually renting one of these.
I checked Netflix, Hulu, Hulu Plus, Amazon Prime, and Crackle.
King Kong (1976)
Superman III
No streaming available.
Conan the Destroyer
Ghostbusters II
Star Trek V: The Final Frontier
No streaming available.
Highlander II: The Quickening
No streaming available.
Batman & Robin
No streaming available.
Planet of the Apes (2001)
No streaming available.
Matrix: Reloaded
No streaming available.
Terminator 3: Rise of the Machines
No streaming available.
X-Men: Last Stand
No streaming available.
Spider-Man 3
No streaming available.
With all the other crap available via streaming, I’m a little surprised by the meager selections available from this list.
This streaming info is accurate as of 11/13/11. As with most things online, streaming availability is always in flux.
***YMMV***