MC is still all speculation based on further assessment...

MC is still all speculation based on further assessment regarding what is actually down there and obtaining a measurable quantity that a company value can be dtermined. If it's commercial QTY then expect another re-rate to the value of the resource. And that's prospect 1 of 4, and the other prospects are better.
However the positive result is also positive for the other prospects so the speculative money would want to get on board now before all possible re-rates. Any commercial QTY will result in a MC many multiples of current.