I have a feeling that it, like RED, will run out of steam. But of course, unlike Taylor, Katy won't be able to shift albums, nor will she be able to tore stadiums, nor will she be able to claim Grammys, nor will she see green on Metacritic, and nor will she be able to lay claim to John Mayer's d*ck first.
The 2 album campaigns mirror each other a lot, I feel. Of course, Taylor is in a whole other league of success....but in terms of planning, marketing and execution, there's parallels.