When you think about it, VZ has Brisas, but GRZ refused to had over all the data. It will be years before VZ can mine there. No $$ coming from there, but a great deal of money has to be put in to get Brisas up and running.
When you think about it, KRY's LC cannot be built quickly without KRY's co-operation. Years before production. With KRY's co-operation, all the years of data and the equipment come within weeks. Building the mine would be only 12-18 months away.
If VZ was to just take LC from KRY, NOTHING could come out of the two areas for at least 3 years, probably more. That would cost VZ bigtime. No golden $$$ to make payments on the many billions borrowed.
When you think about it, one of the mines has to be on a short time line for VZ to get anything back from the 100's of million ( i billion?) to get both LC and LB up and running.
When you think about it, they NEED KRY's co-operation. Only one way to do that, IMO
Penderite