Chyna was almost cast as T-X. Kristanna Loken won the part.

http://www.imdb.com/name/nm0491321/?ref_=rvi_nm

Joan "Chyna" Laurer was nearly cast in the film. Arnold wanted her to play T-X.

The producers liked Kristanna's tall icy supermodel look and went against Arnold's first choice for the role.

Would Chyna have been better?

It would have been a different film.

I think Chyna would have been better because Kristanna cannot act. Chyna was a natural performer and very popular in professional wrestling.

This is academic though as I think making this film was a mistake.

The first 2 Terminator films were awesome. They should have stopped at T2.

To follow T2 with a film as good was a very tall order. Almost impossible.

The script was bad. John Connor was a weakling. This was not Nick Stahl's fault. It was the writing.