timing guess If VGCX has control for six months, their negotiating power is high in months 1-3 and low in 4-6. I'm guessing they take the best offer by 3 months, or they have to convince orion and coeur it's worth extending the arrangement to get a higher bid.
I don't think orion did anything in its deal with couer that vgcx didn't know about and not think is fair and reasonable. Orion wants their "build the mine money" back and move on and Coeur is like hey, let's make some money and a small chance we get the company too.
I don't see imminent fireworks unless there is a fantastic deal on the table, and I doubt that any suitor wants to be seen as overpaying by the official numbers, so there probably is no fantastic deal on the table at the moment.
Instead I see a steady march in share price for the next 2-3 months (1 month soon gone) leading up to a deal at that point... if by then enough new drilling and production has been reported to justify a higher offer.
Where the price of gold is over the next few months is also a factor. All 3 companies involved will be incentivized to not jump too early if gold maintains it's upward trajectory, since this has a positive correlation on VGCX share price and buyout price, and thus a higher payout for all if the end buyer is not Coeur. Not many analysts are bearish gold at the moment. Nor are central banks.