Homecoming surrounds the return of Lilith Antonovich's son, Genpaku Arishima, the former and considered retired leader of the Vanguard. The thread is meant to aid both Lilith's plot and Genpaku's. For Lilith, it opens up the ability for her to return to active duty within the ranks of the Gotei 13 United or follow Genpaku, since leaving the Gotei for 4 years has likely caused problems. It is also meant to reintroduce a character thought lost to the voids of inactivity. The thread very lightly explains the changes and events that have occurred over the four years that Genpaku has been gone in order to give the character a sense of the new world, but also warn him that things are still not the same.
A short bit later, Kaminari returns to Genpaku's side, hopefully letting people know that Genpaku is this Silver person she has been speaking of. Kaminari's reuniting with Genpaku will hopefully allow her to go home or follow another path. It opens up her ability to return to the Gotei, which will allow the possibility of reuniting with old friends, and even her fiance: Kuro Okami, who was (from my understanding) deeply hurt by her disappearance. With the addition of Hayden and Blackheart, the possibilities of affiliations with Vastime open up, but also open up a connection to the Vanguard for Genpaku.
The introduction of the only antagonist I've currently got, though that will change soon. Thread is being used to reveal some things about her outlook and possible plans to start her own bullshit later on in life. However, Ravan's personality has her distracted. He's proving to be rather fun.