The T-1 Typhoon that was left in the desert after Zenna and George were attacked by TumTum Tribesmen ended up having a brief but important role in driving an invading army of Mutant Dinosaurs out of the Dino Attack Team's camp on Adventurers' Island.
Shortly before the Goo Caverns mission, it was established that Dino Attack Team began developing a weapon powerful enough to destroy an entire army without leveling a city. Think this is going to be important sometime in the future?
Hotwire's PDA malfunctioned after Kat's death. Turns out that's what happens when a human consciousness stores itself in a pocket-sized communication device.