The Section 31 novels were each labelled with the series logo, so there isn't a reason The Fall couldn't be the same.
That's not a very good analogy, since the S31 books were all completely independent of each other, connected only by the fact that they all involved that group in some way. (Not unlike the first four Typhon Pact
books, in fact, showing that whether the series titles are used or not has more to do with the marketing department's decisions than with story content.) The Fall
sounds to me like it's more akin to Gateways
, in that its volumes are exploring different phases of a single quadrant-spanning event.