pretty sure by this E3 well see another Mario Party,
Hope its more like Mario Party 4 and 8 rather than 5...

I will love multiplayer online and some kind of story.

It would be really cool to have an online Mario Party.

I've heard nothing about it though..

Mario Party is a big franchise now: they don't want to exploit it yearly anymore. It's zelda-size, and they will take their time with it.

I'm expecting things like online and a great deal of Wii mote implemenation for the next iteration. This is a big franchise for Nintendo now -- bigger than anything Sony makes besides Gran Turismo, for example. MP8 sold about as much as Gears of War, but I don't think people notice that. 

Screw online play!
Board editor FTW!!!
Seriously, Mario Party 9 should be simular to six, because I feel like that one depended on luck the least.

I liked when Mario Party was somewhat ruthless. I don't know if that makes much sense, but it seems that a lot of the competitiveness has been lacking in the later versions. I don't own Mario Party 8 because I expect Mario Party 9 to greatly improve on everything that (I heard) MP8 lacked.

 That would be awesome! creating our very own boards and try them out like in brawl with the stages.

Series has been downhill since 3, they should try to change it around a bit and keep it fresh.

in the n64 & gamecube era, nintendo was the only mini-games support for the systems. Now we have (too) many of them. I think they shouldn't exploit it so much nowadays.
Is RRR3 coming this holiday?

I hope MP9 will have online Mini-game mode. Party Mode will be horrible online unless CPU players take place of the people who drop out. If MP9 goes online, and Party Mode is online, I can't see it being more than 10 or 15 turns. Definitely not 20.

Needs more modes too. Mii playable would be cool with 10 male and female voice options.