How much should be the stock refresher package at end of 4 years be compared to the original incentive stock option grant? This is assuming the original grant underwent dilution due to new equity funding after the initial round of ISO grant.
How much your old grant is worth now is irrelevant. What is relevant is the dollar value (dollar cost to the company) of your old grant at the time it was granted. They'll come up with a dollar amount for the new grant based on your position/performance, and that dollar amount will be converted to shares.
What is the company’s value after funding? How much risk has been decoupled? What role and level are you? Answer these and that will give you a better understanding of what to expect.
Depends how much the valuation has changed. You came in at around a value or 200k and it's worth 2 million at the 4 yr mark, it's unlikely they will give you another 2 million unless you're super important for some reason.