Great designs! Very otherworldly. I know you were trying to steer clear of the Pokemon references, but I can’t help but look at this trio as an iteration of Legendary Pokemon for a more contemporary version of the series.
They usually come in trios, there are always two or three controlling a certain aspect of reality/nature, and a third/fourth super powerful one that is supposed to balance/control them all. (ie: Kyogre & Groudon with Rayquaza, the Three Birds and Lugia, the Three Beasts and Ho-Oh, the Three Dragons and Arceus, etc.)
So while the cosmic/alien concept is very cool and I especially love the way Galactivus turned out, I can definitely see these guys existing within the Poke-realm. By the way this is in no way a criticism at all! I love me some Pokemon. 
