Quoting from the announcement on Discord "Finally Back" could mean "a hero returning home from a long journey, seeing an old friend after years, or even a music competition coming back after a ridiculously long hiatus (sorry)", but you could also interpret it in another way, such as coming back home from a long trip. I think the overall feeling a lot of us will compose with in mind is a sense of nostalgia, but it's likely open on purpose so that way we get a variety of emotions and styles.