I would not be shocked if they’ve already got a batch of demos ready. (I mean come on, Brad, Mike, Colin, and Em are all songwriters) and there could be songs like Unshatter/Let You Fade that were demos during the making of FZ but just needed more time in the oven.
I think Up From the Bottom is probably our best look as to what is to come for the band. Recorded and put together after the first leg of the tour, it’s kinda the first song (to me) that the band was fully together/comfortable to put together, whereas FZ was mostly worked on as the band wasn’t fully formed yet (ie Brad not being on board until late in the sessions.) I hope we hear more songs that are more in tune with Emily’s writing DNA, along with Brad’s since he’s involved from the start this time.