Remember this will only be a template for me. It won't limit the growth of the RP, but give me an idea about what type of scenario you; the players, are most interested in.
Due to not getting any responses that object to spoilers at the end of the arrancar arc, I will include one scenario in this list that relies directly on the last chapter. Most scenarios take place hundreds of years after Aizen, others are AU.



Scenario 1:Although there have been many years of peace, shinigami hatred remains high. A plot develops to invade Soul Society.

Scenario 2: The arrancar invade the Earth to stop the shinigami from sending souls to Soul Society.

Scenario 3: A misunderstanding leads to all out war between the espada and the shinigami.

Scenerio 4: A retelling of the story as if the espada won and Aizen becomes God.

Scenerio 5: Life after Aizen's rule is established. Featuring a distopian future and resistance movements from the remaining rag-tag groups of shinigami, humans, vizards and quincies.

Scenerio 6: Insurrection breaks out amongst the arrancar (random arrancar; not this group) leading to war over the future of Las Noches.

Spoilers
Scenario 7: The espada break into Avici to rescue Aizen after or before his sentence comes to an end. Or alternatively, to kill him in revenge of breaking his promises to their “ancestors” and abandoning them.