Nero could certainly use a temporal transporter, but they wouldn't have to drag all that TCW nonsense into it. The less they complicate the film with lots of "canon clutter," the better chance it'll have of reaching a wide audience.
"It makes me sad to think that the great coliseums of old, with all the pomp and circumstance, and the eating of the Christians, would be turned over to a sport as banal as hitting a little white ball around a field, all the time trying to catch it. It just goes to prove, certain things don't get better."
—I, Q, by John de Lancie & Peter David