I don't see why some people are EXTREMELY excited about this. I just think it's gonna be a cool addition to game that may possibly be as boring as it's predecessor once you've beaten it. Anyway, here's what I think.
First off, Giovanni? I like the fact he's gonna show up, but is it gonna spark Maxie/Archie to tag along as well? Heck even Cyrus might show up on his Giratina to crash the party. ;)
I actually think it's likely, that as it has been done in other games before, although the only example I can think of is getting Ho-Oh after beating 100 Mt. Battle trainers...
Red will probably show up, but I'm thinking ONLY after you've beaten several trainers consecutively or something similar.
If the World Tournament repeats, (like, you beat it once and you can do it again) you'd probably have to win the thing consecutively to see him.
If Red was to show up, it might mean the other protagonists would too. Kris, Ethan, Brendan/May, Lucas, heck, even Hilbert/Hilda...
If it's three on three battles as some have speculated, it'll probably be done Tower/Frontier style where their levels are adjusted to match your strongest Pokemon's.
Yes, something did strike me as being a tad "Battle Dome" about this. My guess is it's just a grand version of the Dome. Needless to say if that's the case I'm excited. I loved the Battle Dome and Pike from Emerald.
Pokemon cant implement this feature into the next few generations because it would be quite redundant(the only new thing would probably be new teams or movesets)
This is what I was thinking as well. My only conclusion for this is that Pokemon are going to finish off their Generation with something grand and that will be well remembered before they move on to something better. Because, it's quite clear the next Pokemon game after BW2 will be for 3DS, (you know, seeing as the 3DS is one of Nintendo's Proudest Achievements and Pokemon is it's crown jewel) which will probably mean they're upping the generation to VI.
I imagine the tournament system will be a bit like the Battle Dome in Pokemon Emerald. Although instead of battling with just two Pokemon, you battle with 3 (going by the screens).
After squinting my eyes, I think it'll play out like the original Battle Dome. 1v1, winner faces winner etc. But the fact half the participants are outlined in Red and the other half are in Blue I see your point.
Also, I can't see it too well but on the CoroCoro screens, there look like some more sprites I can't make them out. Yes, I can see the Gym Leader sprites in the Tourney screen but I'm talking about the right hand side, I can't see it too well, but they're probably just more Gym Leaders...