(Some sites claim that these two different statements mean Schwarzenegger is definitely playing a human and definitely not playing a Terminator; I wouldn’t be so sure that’s confirmed at this point.)
When I interviewed Arnold Schwarzenegger a few months ago, and I asked about whether we might see more Terminator, Conan, and Twins movies from him, the former Governator told me he fully expected to make all three, with Twins 2 (or Triplets) coming first, followed by Terminator and Conan.
In a new interview with Kleine Zeitung (via ThePlaylist), Schwarzenegger again pegged Triplets as his next big sequel.
A few months later, it seems like that timeline is still completely intact.