Short answer.....there is no way to forecast that in light of the many variables involved. Example: What if a private company that is not a corporation ? There would be no shares in that company. Or, if we merged with say a company that only had maybe 1 mil shares, but the valuation was $2.00 ps . We have billions at this point, (of shares), @ a value, (pps), of 0.05 -06. In this case, it would depend on who the BOD of both companies decided on who would end up the primary on how the shares were divided.
I have seen a couple of instances where the shares were given to the shareholders as a dividend of the acquired company and were absorbed in that way. Also, even in a merger, the company's can remain ' stand alone' but still the new joined entity. There are literally 100's of ways to merge and even more ways to structure the outcome. GLTA