I don't agree with the idea that we can know for sure if a book has ended because ''the solicits make it sound like a finale''. We have had cases of that happening and the book continuing either way. I mean, look at Moon Girl And Devil Dinosaur's September solicit, it also sounded a lot like a finale, and the book will continue during Legacy. So unless we have an explicit confirmation that the book has ended, I'm not considering it off the table.
A book missing one solicit doesn't always means cancelation, either. We have had cases of books taking a break for one month (like Ms. Marvel, The Totally Awesome Hulk, Silver Surfer).