You never know. The vast majority of stories that get optioned or bought by Hollywood studios never ends up becoming films, and I’d truly given up on any of my books being adapted, but then everything lined up sort of magically for The Fault in Our Stars.
I own the movie rights to both Paper Towns and An Abundance of Katherines right now, and I’m not inclined to sell them unless the movie could be developed by a team of people I like and trust. (That has been the case with TFiOS, which is why the process has been so fun and invigorating. Most authors do not have such unambiguously positive experiences.)
The rights to Looking for Alaska are owned by Paramount. I don’t know if they’ll ever make a movie. I haven’t had any contact from them in many years. But certain the TFiOS movie increases the chances that some/all of the other books will get renewed movie attention.
My policy is to try to be happy either way: If a movie gets made, then it brings lots of new people to the book, which is great. And it’s a wonderful thing to see a story you’ve imagined take visible form. But there’s also something magical about a story remaining textual. No actor will ever “be” Holden Caulfield the way that Daniel Radcliffe will forever “be” at least part of how I imagine Harry Potter. And if we never get to see Alaska and Pudge, or Colin and Hassan, or Q and Margo, that’s okay with me.