10 Amazing Behind The Scenes Secrets Of Star Trek: Enterprise
3. Why The Romulans Didn't Attack Earth
In the second season finale, The Expanse, the Xindi attacked Earth, which began a brilliant season-long story arc that profoundly related to the 9/11 terrorist attacks that happened only two years before the episode aired. Interestingly, before we knew more details about the invaders, some fans initially speculated that the Romulans were behind the attack.
In issue 145 of the magazine Star Trek: Communicator, Brannon Braga explained that using the Romulans as the villains for a season-long story arc would have been a 'big mistake' because they would have become old-hat. This is strange to hear, considering that Earth's war with the Romulans was one of the defining parts of this era of Trek history.
While it would have been nice to see more of humanity's first interactions with the Romulans, the episode Minefield at least gave us a good idea of what the writers had planned for the cancelled seasons.