To be honest, I don't seem to recall any major RPG releases being mentioned leading up to Gen Con 2015 and I don't see anything being talked about post Gen Con.
Well, thats not true. Post Gen Con talk has focused on the embarrassing stunt Cam Banks and friends pulled at the ENnies and then there is the whole Ken Whitman fiasco with his assorted video releases that weren't released (and death threats!)
Was anything of note actually released at Gen Con this year?
Clark Asthon Smith's Zothique, Appendix 'N', & Castles & Crusades - The D'Amberville's Secrets & Necromancy - “Gaunt as starved herons they were, and great of stature, with a common likeness; and their sunk eyes were visible only by red sparks reflected within them...
53 minutes ago