My prediction a few weeks ago has proven to be incorrect. I had expected a huge fall in the share price. This did not happen at least not yet.
My prediction now is that TECK may or may not buy a portion of CUU but it will not agree to to any contract that would force it into building a mine with any fixed timeline. They have other options in the copper space as well as in coal of course. $3b is just too much to commit in an uncertain world.
Teck might offer $1.20 a share to buy out CUU as a long term pipeline resource. I doubt that this will happen but it is possible.