House of Cards
Enterprise is too expensive for Netflix, its a simple as that. It's 3 original shows now are a fraction of the cost of what Enterprise would be to make. CBS is not going to return to the past, it will make a new Star Trek series at some point that may or may not reference past Trek.
cost a reported $100 million to produce two seasons worth of episodes (two season of 13, I believe). That isn't chump change.
Of course, that's a prestige show with a motion picture director (David Fincer) and two major motion picture actors (Kevin Spacey, Robin Wright) participating in it. A new season of Enterprise
wouldn't warrant the same level of investment.