Methinks the bigger question is, "how long will ProTour last?" I'm not sure how everything is structured, but it seems like ASO and the Grand Tour organizers are really unhappy with the UCI right now, so who knows.
I can see them getting some spots, possibly even a TdF wild card, either due to better riders or to make some kind of anti-doping statement.
FYI, Slipstream is already competing in Europe and wants to be a part of ProTour:
Originally Posted by Alicia Hopkins / Daily Peloton
Alicia: The team is scheduled to race in Europe this season, do you think you will be invited to any Fall Classics?
JV: I do not really know. I think the Pro Tour thing needs to sort itself out first before we figure that out. Our calendar in Europe is already full, really full. We have over 100 days of competition over there. We did last year as well., this year we are just doing slightly larger races. I think we it is pretty exciting for the guys, and they know the drill now. I think they will start to perform a little more visibly over there.
Alicia: As far as the Pro Tour is concerned, do you see Slip Stream becoming a Pro Tour team eventually?
JV: Well, if the Pro Tour exists, I do.
http://www.dailypeloton.com/displayarticle.asp?pk=10580
That was back in March btw. In that interview, Vaughters also expressed interest in Millar, Vandevelde, Hincapie and O'Grady by the way. Hmmm