It all depends on the reviews. If they are raves, that plus the name of Elton John could make this a very tough ticket indeed and they may extend the booking sooner rather than later. As a rule, booking periods are added in blocks of six months at a time and it's very rare for a show to have more than 13 months worth of tickets on sale at any time. So my guess is they will extend through to May of 2006 fairly soon after the reviews come out.
Nothing precious, plain to see, don't make a fuss over me. Not loud, not soft, but somewhere inbetween. Say sorry, just let it be the word you mean.