User blog comment:Ktrfgfg/Chapter 53 Predictions + Volume12Special/@comment-187.149.45.66-20131221232323/@comment-121.209.177.34-20140105064148

True. They're still in the middle of Hisotria's past so they've gotta finish that, deal with the wall Titan, take back wall Maria and shiganshina.

Also, maybe in one of e next episodes, one of the Titan shifters might somehow get their hands on the basement key