umm 8 or 9 maps i think so far with more coming on the 6th. 3 modes
splatfest (free for all) and 2 ranked battles, the tower control and ranked splatfest
on the 6th
getting 2 new battle options
private battle and squad battle
from 2-8 player for those, and in squad battle you are always on the same team as your squad.
level cap increase from 20 to 50.
2 new ranked battle ranks s and s+
2 new weapon types, splash and gatling
40 new pieces of gear
still no voice chat..
more battle types coming "soon"
rainmaker is not in the 6th update.