I don't think the T-Rex could stand up to say, a flight of Apache gunships. Hell, I'd glady go into the Army to learn to fly the Apache to be a t-rex rancherSo... if humans re-introduce T-rex's, we will have to become their predators in order to control them, or else T-rex's (like all other forms of life) will reproduce and spread as far as they can. And I have this feeling that T-rex's and humans won't get along too well.
Of course, worst case scenario is we bring the T-Rex back to life, only to find out it carries some uber-form of salmonilla and causes a massive plague.
