Here's how you make season 5 a reality in current era of star trek enterprise.

Options A

NX crew were stuck in a timeloop, they break the loop finally and due to the loop they've aged.

Options B

You have them act but digitally deage them to their 2005 age.

Additionally. Season 5, 6 and 7 are signed ahead of time.

Colombia is made side by side with it using the same sets and runs for 5 seasons, Colombia to make it different from enterprise has a defiant refit for a look similar to wraith of khan defiant class.

>>212937380
still wish they'd had the balls to actually canonize the NX-01 refit
it was basically a fanfic design designed to help sell a calendar during the wilderness years that Pocket Books pretended was real
aside from using a toy of it in the background of a shot in Picard, it's still fanfic