I wonder if maybe the older Heroes (the parents...Mrs. Petrelli, Hiro's dad, etc) thought they could "breed" more heroes by combining hero sperm and hero egg in a lab, placing the resulting offspring in adoptive homes, and seeing if powers manifest (dont know if non heroes would have carried the fetuses to term or what...havent gotten that far in my theory! or maybe they have a whole secret lab w/ artificial wombs??
). So Nikki/Tracy could be twins, or clones, or whatever, raised in seperate homes. And i'm unclear if Nikki's sister (the one that died??) was also a twin? Hmmm....
But didnt Lindermann say something like "we thought it would be easier if she looked familiar" or something similar, about Tracy...so....what if they JUST created her (with fake memories, fake history etc...they have connections and money they could totally do that!), a clone, and placed her in that job in DC solely to entice Nathan back to politics??
Personally, i think they backed themselves into a corner killing Nikki last season, regretted it but didnt want to revisit the whole louisiana storyline (with the cousin), so they just started over w/ the same actress.
Is the little girl who can locate people totally out this season? I know they mentioned taking her somewhere safe. What about Micah, i'm assuming he'll have more of a storyline, i thought it was cool he knew Tracy wasnt his mom immediately.