things changed:
guts lost an eye
guts lost an arm
the band of the hawk is dead
griffith gets his shit completely ruined
griffith became a godhand
guts has gone through like 4 or 5 swords
guts now wears berserk armor
the war with chudda ended
the war with the kushans began
new characters
king od midland died
kushan king became uber charge'd

things assumed to change:
kushan war ends
kushan king dies
griffith marries charlotte and finally has a kingdom as he prophesized back in the flashback arc