I suspect that the almighty "They" reasoned thus: 'Obratzova got the revival; so we'll give 2009-2010 opening night to Golub.' That - and the process of elimination based on who they had to choose from. Naturally, it doesn't matter that Genichka has far more artistic and technical mileage than Golub, and to spare. Is there a Principal who has covered, (or) is covering Simbiuke? Intrepid Principal Dancer Alina has repeatedly shown that she's incompetent and incapable. It doesn't matter how many, (or how few), man-hours she's drilled. Even if she started learning Simbiuke in London, it wouldn't matter. Her Juliet debut at CG was the balletic equivalent of Baz Luhrmann's "William Shakespeare's Romeo + Juliet."
It would make sense to start with Obratzova. She was the Juliet and Aurora of London's summer season, and the best and most critically acclaimed Juliet and Aurora of her generation in the Maryinsky Theatre. However, given these facts, that would be too much like the right thing to do. But never fear: October 8 the first "Swan Lake" of the year is "TBA." They should announce Kondaurova, Vicky, or Dasha Pavlenko - a Principal who, btw, has never, ever opened a season at home in "Lake" or any other ballet. My guess is that Alina will be O/O on Oct 8, and eventually she'll essay Simbiuke; probably this year.
She's so ubiquitous, she's become inevitable. There's no other way to describe it.