The incoming patch is mainly for Strategus, but there will be ofc some tweak and change on weapons stats (example remove crushthrough on barmace), may be new weapons (crusader sword?) and new armors (samurai), and normaly there will be new game modes.
This is what i gathered in the forum, not certified info.
Btw, there will be no changelog as always (it's not a problem for me, i don't care uber-build, i just want to play and have fun).
Tbh, i wait the patch only for Strategus.