"Take a dump on the face of common sense." Seriously, that's a line stated in the Disgaea 4 trailer here. This is just crazy and only a company like NIS would be able to pull off this type of insanity.
As for the game itself, there's a lot you can do. The six-minute trailer covers the basics, such as the weapons system, how you'll be grinding, how you can battle, steal your friend's characters over the online battles to much more.
Seriously, NIS pretty much did our job here by explaining everything. We did get some hands on with the game today though and Sherilynn Macale will be bringing you a preview early next week. Until then, know that Disgaea 4 will be out this September. Enjoy the insanity in the video and the screens in the gallery.