The text of the bill is here [via Doorey]. It requires that all outstanding issues, including contract length, be put to binding arbitration. Of course, if the arbitrator decides to award a three-year contract, CUPE 3903 would be on the outside for the 2010 festivities.
Now consider this. Of course this is not an official CUPE document and might not be genuine, but the York Strike blog is frequented by CUPE members, who often leak internal union discussions. The letter, from CUPE Ontario president Sid Ryan to CUPE National president Paul Moist, makes it clear that CUPE is considering an injunction to bar the implementation of back-to-work legislation. Most interesting is the following (emphasis mine):
We have no choice but to take all measures to defend free collective bargaining, especially given our coordinated bargaining strategy in this sector and the advanced bargaining in all our sectors.
So if this letter is genuine, it would appear that CUPE Ontario's desperation for the coordinated bargaining strategy is driving their legal strategy.
How likely is it that an injunction would be granted? Doorey says maybe.