If that is what the Quebec government is worried about, they could easily avoid it by having an open competition which requires that the arena-management contract will be awarded to a candidate who brings an NHL team to Quebec City and signs a 30-year lease. All legal and above board. PKP would easily win it. Even if it's someone else, Quebec wouldn't care.
The problem with this process is that you can't negociate with the winner. If you forget something in the initial proposition, you can't reopen it. The winner gets the contract and that's it. When you negociate a deal with someone, we can always bring up new clauses. In fact, both sides can tweak things, that's what cities want to be able to do. They don't wanna be forced to deal with the lowest bidder respecting all the conditions. Sometimes, it will cost you a little more, but you'll get a better product. That's why a lot of cities are for this special bill.
Nobody wants to be handcuffed by an initial proposal. De Bellevalle is only criticizing the contract between the city and PKP because he is a Lallier apologist and Lallier didn't want to invest money for sporting events. So he dug up an unclear law and now tries to derail the project. Legally, there isn't even a problem with the Quebecor deal because the law states that the city must show that they explored all options, which they did. They met with Bell and other groups but chose Quebec. So according to the provincial law and their own city chart - which has more power than the provincial law - what they did was fine. The only problem is an ethical one and it isn't debattable in front of a court. De Bellevalle has no cause and he knows it, he is just stalling for whatever reason.