Galaxy Quest to Become a TV Show

Hollywood seems to have entirely dried up the well on fresh ideas, so much so that the 1999 scifi classic Galaxy Quest is being adapted into a TV series.  There are no details about the cast or plot yet, but the film version's writer, director, and producer are all on board for the series, so there's hope!  But if they can't get Alan Rickman to reprise his role? Why bother?