That's the writer guessing that it "could.". Certainly not U2 saying it will.
The band clearly plan on releasing 2 albums, and quite possibly a third. Things can obviously change with this band... and anyone who completely dismisses the chances that anything beyond this album could be scrapped is ignoring the past... but at the same time, this is clearly different than the past because it appears that they've actually completed the plan ahead of time, rather than just say they're going to do it.
The band clearly plan on releasing 2 albums, and quite possibly a third. Things can obviously change with this band... and anyone who completely dismisses the chances that anything beyond this album could be scrapped is ignoring the past... but at the same time, this is clearly different than the past because it appears that they've actually completed the plan ahead of time, rather than just say they're going to do it.