I think Twilight Princess was the step that rekindled a lot of why I love the Legend of Zelda series that I haven't felt since the N64 Zelda games. I really hope that the next Zelda take even more full advantage of the
Wii controls (i.e. Balance Board).
I don't think you could do online capabilities unless you did something like Four Swords. Zelda's not RPG enough to do something like online battling.