For those who don't know what Crusade is, it was a Babylon 5 spin-off that takes place three years after the Telepath War. The crew of the starship Excalibur embarks on a search for a cure to a bio-engineered plague that infected everyone on Earth. They have five years to find a cure and if they don't by that time, everyone on Earth will die. The show suppose to be a five-year story arc but the show was canceled before it could complete its first season. Now JMS has said that the search for a cure to the plague wouldn't be the center of the show but rather something to pull viewers in at the beginning. He planned for things to take a different direction in the second season when the crew goes rogue and fights against a conspiracy within Earthforce.
Now, you have been placed in charge of a remake on this show and since the show was cancelled and we don't know the full extent of JMS's plans for the rest of the series past the crew going rogue, you have free range to take things wherever you want. Hell, you can change elements of the universe that the show takes place in and makes it different from the Babylon 5 universe some ways since it won't be a remake of the original Babylon 5 show, which would piss off a lot of the hardcore B5 fans.
Now, you have been placed in charge of a remake on this show and since the show was cancelled and we don't know the full extent of JMS's plans for the rest of the series past the crew going rogue, you have free range to take things wherever you want. Hell, you can change elements of the universe that the show takes place in and makes it different from the Babylon 5 universe some ways since it won't be a remake of the original Babylon 5 show, which would piss off a lot of the hardcore B5 fans.