When will "The Mystery Knight" novella be adapted to graphic novel form?
I do hope to do a MYSTERY KNIGHT eventually with the same team, but it will be at least two years after WARRIORS is released. That's the contractual period of exclusivity.
I recall Valyrian Steel fielding remarks on the sword's hilt being cruciform, whereas some people have imagined that the true bravo's sword is somehow different. I never had that impression, myself, but I admit to wondering if the bravo's swords are supposed to have more encompassing hilts (swept hilts, bell cups, and those other sorts you see on rapiers)..
No, I vetoed all the basket hilts, bell cups, etc. Those are artifacts of a much later period in the real world, and would not be appropriate for a blade made by a castle smith in Westeros.
Unfortunately, the HBO swords will use different designs. The show has its own armorers, who will do their own original designs on the weapons and armor as seen in the series.
As to why you might want to buy these... well, for the same reason you might want to buy a Valyrian resin of Ned that does not look like Sean Bean, or a Dark Sword mini of Jon Snow that does not look like Kit Harington. Do you want a keepsake of the books, or of the TV show? If the show goes forward, you will have your choice.
Also, in the specific case of these swords, I retained the right to license out high-quality steel replica swords, and that license is held by Valyrian Steel. HBO has the right to license inexpensive toy replica swords. So if you'd prefer something made of plastic that you can pick up at Wal-Mart, that may indeed be available at a later date... and will look just like the weapons in the series.
HBO also has exclusive rights to do lunchboxes, key rings, and bobblehead dolls, among other things. It was a VERY long and complicated negotiation.