An alternative for a 2000 AD property might be to ditch the open-world-style thing, and run something with more linear action. Shadowgun Legends could be a way to do something with Dredd or (especially) Strontium Dog, although I'll admit I don't know the budget of that game either.
Ultimately, though, games are bloody expensive to make – even ones we consider relatively simple. The infographics surrounding the two Monument Valley games neatly showcase that. And one might surmise that had Judge Dredd vs Zombies done stonkingly well, it wouldn't be alone on the App Store in terms of 2000 AD properties. As for gamebooks, Judge Dredd: Countdown Sector 106 is gone entirely from the App Store. Drokk!