As I was posting in another thread about a Gwildor/Orko 2 pack I thought about this. The Cosmic Key could bring the future to the present. I think it could work if they wantd to go that route. Becasue then you dont have to go and have the same story as the original Na and keep all the characters in the classic present. MAybe the present time needs help from the Galactic Guardians instead of the other way around. Or maybe Gwildor opens a portal and the Mutants come thru and they team up with bone face or the snakes and are really powerfull. So they go into the future to find out hwo to beat them. And the GG come back in time to help the Masters.