Board Thread:Wiki/@comment-5774380-20191209053847/@comment-44630497-20191210185033

Naming Return to Shiganshina "Basement Arc" would be dumb because the basement was only one of two main objectives, and we had no way of knowing it was as important as it was until we saw what was inside. Naming the Female Titan arc "Shiganshina Arc" would be dumb because they never get close to Shiganishina, and it's only really mentioned once or twice in passing.

The Rumbling on the other is literally occuring right now in the story. Whether or not it kills all life outside Paradis is irrelevant, it's the fact that it's been initilized that I think matters. This arc has all revolved around it anyways, even before it was used. The arc starts off showing us war meetings where the military discusses how the rumbling can be used, and much of the focus is on desperately trying to find plans that don't involve using. It's a big game of whether or not it'll happen, up until 119-125 when it does.