SHIN KERORO GUNSOU MOVIE: FUKKATSUSHITE SOKKOU CHIKYUU METSUBOU NO KIKI DE ARIMASU!

The Keroro Platoon, living their lazy days as if invasion were nothing. Then one day, they face a series of bizarre phenomena erupting across the nation. Feeling a sense of crisis, the Keroro Platoon rises up, staking their pride as invaders! What is the meaning of the mysterious symbols they encounter wherever they go. The largest-scale battle in the history of "Sgt.Frog" begins in the Reiwa era! (Source: Crunchyroll News, edited) Note: Relations are provisional and will be updated when more info is announced. — Description from AniList community (anilist.co).