You are going to laugh, but a Where's Waldo? (Where's Wally? in some countries) movie has the potential to be a truly big and epic franchise.
If you know the original books, you might be aware of the enormous imagination and details those pages have. Not only the worlds itself, but the idea of time travel, parallel timelines, all this amazing worlds created from scratch... if they find a proper story to carry the film, they have tons of ideas for the visual aspect. There's a sense of Wally always being chased, by us the readers, but also people who follow him from page to page, world to world. There's always something going on. And we all know how time/space travel can open up things for different storylines.
I want them to start writing this thing, I'm damn sure there's a big adventure/science fiction movie behind this, if they take the character/s seriously.