I was one of the people that went on the Goliath tour in January. That question was brought up during the tour and Brandon (from SF) said he doesn't think the trains will, however, he said he wouldn't be surprised if they ended up having them.
Just realized the park poured some concrete bases under the first drop, the dive loop, and the vertical loop. The ride looks like it might be testing soon!
^ The brains are going to have no members left at the merge - they almost lost the challenge again. It will be interesting to see how it plays out. Maybe the brawns and the beauty will be the only two tribes left at the merge? I can see a twist coming up...