I've mentioned it on the Kickstarter (
http://www.kickstarter.com/projects/1894400580/amethyst-fantasy-and-technology-collide) that we have it on authority that there will be at least an SRD and probably an OGL for D&D Next (5E). You would have to have a major regime change at WOTC to cast doubt on that. WOTC is committed in rebuilding their 3PP base after 4E. DEM was the first to sign (so goes the rumor) to the GSL, and we’re even more confident now. That was point one.
Point two is that we stated that when D&D Next is released, we'll then release the version of Amethyst for it. So obviously, we'll be waiting for the final rules before releasing that edition. It won't be a rules-free version--it will be a fully adapted setting using D&D Next. Our release date indicated refers the due date for the majority of the content (4E, Fate Core, Pathfinder, Savage Worlds). I added in an update that both 5E and 13th Age will take a bit longer. If the KS succeeds, content will start being released as early as Christmas and will continue steadily the weeks and months to follow.
Our third point is that if by some weird voodoo circumstance a SRD is NOT released, there are still ways to create a compatible supplement for 5E. I learned that from Joseph Goodman.
I hope that clears up any doubt. I remember fielding similar concerns when DEM started mucking around in the 4E sandbox. WOTC never tried to take our IP away. They never flexed copyright or frowned on us breaking philosophy. Of course, they could have done better in their relationship with 3PP, and they know that...
"We aim to create a more cohesive tie between WotC and third parties"
So yes, there will be a fully realized version of Amethyst for 5th Edition. It will happen.