In a way, nothing much has changed: things still look unlikely. Before it was the unlikelihood that he wouldn't be able to get fit enough to play for the Tahs in 2011 and thereby put his hand up for the Wallabies. Now it is the unlikelihood that he will get fit enough, soon enough, to get any time to play for the Northampton Saints.
The difference is that the new unlikelihood is something closer to the present. This makes the original unlikelihood less unlikely.
I never thought he would have the time to prove himself for the Wallabies squad by playing the odd game for the Tahs. I always thought that the only scenario wherein he could play for Oz in the RWC was if the Wallabies picked their squad for 3N this year, as normal, then added him to it as a development player, so to speak, to bring him up to speed within the group. During this time he would be playing every Saturday for his old club, Sydney Uni. After being out of pro rugby for so long that will probably still be the case.
Northampton, 2nd favourites for the premiership as we speak, will have a bigger agenda than helping Vickers to get match fit. If he can't cut the mustard, he will be lucky to get a run in their Twos. But if he can cut it; boy, if he can....
Folks will belittle his chances of making it, and there would be some sense in doing so, but watch the minds switch over if he stays healthy and others don't.