Hm... Well, what type of success are we measuring? If we're talking about stuff like gameplay and graphics I would say Twilight Princess already outdoes
OoT. They have spent a long time perfecting this game (with all those delays... *sigh*) so it's only natural to assume it might be more successful than the first 3D Zelda. The graphics are much better and the gameplay certainly looks amazing (I haven't played the E3 demo so I'm assuming the controls are like WW with different graphics, and there'll deffinately be more sidequests with such a big world) so unless they seriously mess up somewhere it's guaranteed to attract more people, including those who've never heard of the series. This game is one of (if not THE) most anticipated game this year so people who don't know anything about it will be drawn to it because they want to see what the hype is all about. I'm not criticising
OoT - heck, it's my favourite game with
TWW! - but it's just my opinion about those things.
Now, if by success you mean all that business stuff (how many were sold an all that) the I would also say that
TP will still probably outdo
OoT. Back in the good old Nintendo64 days, gaming was quite popular. However it's nothing like these days, where practically every teenager (or just household in general) has a gaming console. More people play games nowadays, and even if the Gamecube is not the most popular console the number of Gamecube owners is still larger than those who owned an N64 back then. Most of those owners will probably buy
TP. Maybe some strange people will buy a Gamecube just for
TP (actually I can understand this - the game seems is worth it).
And of course, as Mr.Man already stated above, it's important to remember that even if the Gamecube isn't the most popular console, Nintendo Revolution will be backwards compatible and a lot of people will get that console. This means more people will buy the game because they'll be able to play it on the Revolution. Thus, sales for this game increase. This sure reeks of success to me.
And even if it doesn't surpass
OoT in success, more than likely every member of this forums will go out and buy the game regardless of how good it is statistically. We waited too long, and it's proving to be worth every cent. More than that, it's the fact that it's Zelda. The devoted Zelda fan will buy the game no matter what, right? I'm marching to the stores when they release it, and I'm sure it'll fulfill my expectations.
That's all I have to say n___n