If I understand correctly, drandula's native language is finnish, and since learning finnish is like beating yourself with a deku stick for seven years (seriously, grammar-wise it's probably WORSE than learning latin, or so my finnish friends tell me) it is totally OK that english is hard. Umm, yeah I don't mean it in a bad way I just mean... going from finninsh to english... it's hard cause the language center in your brain is filled to the brim with your own language... which is hard. Right?
Anyhoo, the backgroud story.
I find the idea of pre-historical heroes sealed away somewhere in the time/space of Hyrule interesting. I imagine you are going to let the hero of the game have a reason to find these pre-heroes, either to fight a newly risen evil or just because, well, it's the neighborly thing to do. That idea gets a thumbs up.
If you want to have the heroes sealed and hidden in TIME, having the Ocarina of Time reappear as a means to travel more freely between timeperiods, not as much as adult/child timelines as in OoT, but perhaps as in several different timeperiods, like in the SNES game Chrono Trigger, it would be interesting, and certainly an excitingly new touch to the series. However, remember that it wold mean a helluva lot more work for you, making different timeperiod-versions of every map in the game.
Now to the parts I feel... dubious about. The triforce and the "time" thingie.
New takes on the Zelda story is of course commendable, but I feel that tampering with the whole concept of how the Triforce came into being is a bit too much - I just think it would be more fun if you built your story without changing anything already stated many times in the games, cause Zelda fanatics tend to flinch and feel uncomfortable about those things (I do.)
The triforce was left behind after the goddesses left their newly created world.
The other thing is about making four heroes, a female which is related to time... Basically, even if I might get hammered about this later, MANY - not all but enough, zelda fans think that the "goddess of time" mentioned in majoras mask is Nayuru, the goddesses of wisdom who brought the spirit of law to the world. Many perceive this as "She made time move" and she made the laws of physics, gravity, etc. Separating the power (triforce) "Wisdom" with the concept of "time" craves a helluva good motivation for it...
Maybe instead of betrayal, an accident (or a last curse from the evil they fought) sent them flying through the dimensions, and Link goes on a mission from Zelda/old wise man/deku tree/ whoever is knowledgable about this - in order to find and rescue them cause the prehistorical evil (Worse than Ganon! Oh my!) has risen again and only they know how to stop it.. Maybe the evil is what corrupted Ganondorfs heart... a chaos god.. wait, now I'm losing it!
About the idea of the fourth evil heroine: Basically, I've read fanfics, and such, portraying female bad guys in Zelda, and... well, they suck. As a female zelda gamer, it's extremely awkward when people create lame female characters. Basically, because a "good girl" doesn't need any complex character and is therefore easy to create, but an antagonistic girl or woman needs something more. It's not that I think you're incapable of creating characters, but I'm just saying that it's HARD. creating the technical part of a game is hard, and your work looks good. But beautiful games with bad stories are always a bit sad to play, cause you feel like, "if only this character said that instead"
I guess it'd be more fun if you created a totally evil unworldy chaos-thing that cursed the three heroes, or even more dramaturgically interesting, CORRUPTED them. Maybe Link and Zelda could un-corrupt Ganondorf and team up in the ending battle.... ^^
Or if such a being corrupted whoever betrayed the three heroes and when Link meets this fourth person he/she is filled with regret and desperation...
Anyway, just DON'T mx in the riforce in a weird way, and please, don't seperate time&wisdom.
Maybe tte fourth "betrayer person" wasn't a hero, maybe it was a friend/family/royal person suddenly overtaken by dark powers...
Well yeah... I'm just saying... umm, yeah good luck. ^_^