So much potential (McConaughey, Elba, seemingly a decent sized budget, and - mainly - the whole darn mythology of the Dark Tower books themselves, much of which I would think is super-visual) but squandered in a film that never feels at all convincingly epic, undermined at every turn by flat direction, odd pacing, an unfortunate mix of over-explaining and under-texturing, and, several times, a horribly tin ear for dialogue.
(plane viewing #6)