Dengeki PlayStation posted a more detailed report about Disgaea 4’s online features. Players can send out their characters pre-programmed with AI options on a ship and out to the Internet. If you have the option to let invaders appear in your game on you might run into a party created by another player.
The magazine hints that characters can be enemies or allies. Nippon Ichi also created a bounty ranking system where wandering parties are ranked by strength. It appears if you defeat a bounty party you can earn money, 42,090,546 HL for defeating Fu-ka in the example above.
Nippon Ichi has another magic cameo. Bikkuriman appear when you cast Omega Star. Meito Anizawa shows up when you cast Omega Fire, so all "Omega" level magic may have a cameo.
And it looks like the rumors about a map editing system are true. Dengeki shared this screenshot and said (with a teasing question mark) the first built-in map edit feature.