Oh, I think that sooner or later someone will adapt 50 shades for b/j fic, it's just that 50 shades itself is not original, lol. That's the problem with it - it's a very generic concept that's been done to death before, only 50 shades turns it 5 times longer than before, and puts it into awful, cringeworthy prose. "Fabulously rich Alpha male seduces an innocent virgin and turns her into his sub" books have been written since the dawn of Harlequin, or whatever its NC-17 rated counterpart is called.