^ 2001 was based on Arthur C. CLarke's novel, Blade Runner was based on a Philip K Dick story, The Matrix borrowed heavily from cyberpunk and Grant Morrison, Star Wars was influenced by 1930s cliffhanger serials and Joseph Campbell's writings on the power of myth, Avatar had much the same story as Dances With Wolves or A Man Called Horse. The likes of Dreamscape covered similar ground to Inception.
What made all of the movies you name classics (and I accept that they all were/ are) was the execution, not the concept. As yet, we know nothing about how Space Command will be executed. It could be taking an old idea and putting a whole new spin on it.