It looks like producers want to start shooting Terminator 4 as soon as possible, even without Arnold Schwarzenegger in the cast.

Andy Vajna spoke with Australian paper AAP, while on the set in Hungary of his latest project Children of Glory, about having The Govinator in the cast:

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"If he does, it won't be in the title role; we would like Arnie in it as a cameo. We want to go on with The Terminator and turn it into a real sci-fi picture and there is a very interesting role for Arnold if he decides he wants to do it. But I am not sure where he is with his politics and all that, we will see."

As far as shooting down under, Vajna told the paper he's looking at a few other places:

"We were thinking about Australia; we have been looking at the Warner Bros. Studios down there but it is early days. That would be probably early next year. We have the script ready and we are now looking for a director and figuring out what the next step is."

The script for Terminator 4 is written by John Brancato and Michael Ferris (both for Catwoman and The Net).

Warner Bros. has set a 2007 release for Terminator 4; no word yet if that will change.