Adventure Time Season 1 A boy has a crush on girl and fights colourful monsters w/ his talking dog-brother

Adventure Time Now Boy has Existential Crisis and his best friends are lesbians

Gravity Falls Season 1 Boy and his twin sister meet Gnomes (one is named Shmebulock).

Gravity Falls Now Ancient demon possession.

Steven Universe Season 1 Boy goes on fun adventures with his three magical stepmoms and accidentally turns his fingers into cats

Steven Universe Now Caste System and racial prejudice; war, loss, and grief; imminent destruction of Earth