Where does Keith, lance and pidge participate in the altean!Hunk and Altean! Shiro?
Keith grew up as a Galra with the blade of marmora. Notices he ages fast (like I hc Galrans have long lifespans) Keith discovers he is half human and travels to Earth to find some answers and look into clues for Voltron. Figures out how to shift into his human form, joins the Garrison, gets kicked out (similar in the show basically).
Lance and Pidge are gonna remain human (the reason for this is because Coran is an instructor at the garrison and Allura is a senior office, what position Shiro had and got suspended/fired which was do with with her digging around into her Father’s death. So Allura is Lance’s hero, that I dig and Coran is one of their instructors, their fav one)
I’m thinkin then Altean!Shiro crashes to Earth (maybe escaping the Galra) but also a piece of Altean technology which Allura discovers and links her to the castleship. Gang saves Altean!Shiro, find out Keith’s half alien then find Blue Lion and off they go into space and find Altean!Hunk.