At the end of the day, the return is the same and if anything the return will be greater since presumably "it's being done right" if we do get the silver or RE3 incorporated. The only thing that has changed is the timeline that you'll get paid. This sucks for people who had plans for the money by a certain time, but for anyone with a longer timeframe, you can buy cheaper and make your gains bigger.
If you buy something at say a $1, and in a year is $2 - does it matter if it was at $1.50 the whole time, or 50cents and moved up really quickly within the last month? The only way it has an impact is if you're buying more or selling before that point.
If you're invested, and looking at the end game (i.e. buyout) then it means nothing. If you were trading, or looking for a quick return in a short period, then that was a risk you should have taken into account. This is negative news for people who wanted out by X date, but is positive news for anyone who has a longer time-horizon and has the funds to buy. No news matters at all except for news of an offer/buyout for those who aren't accumulating, selling, trading etc.
Now figure out what camp you're in, and act accordingly.
A) Trader: Looking for a short time horizon, high-risk/high reward. You should sell now since your goal hasn't been met.
B) Long term investor: 1) If you have funds you should buy, or wait a bit for it to go lower and buy then. Don't hesitate though as no one ever realistically catches the bottom OR 2) If you don't have funds and a risk taker sell and buy back at a cheaper price OR 3) If you're not a risk taker just wait till we get bought out, the day to day will only make you emotional (in either direction).
At the end of the day, just figure out why you invested and whether any of those reasons has really changed. Did you invest to be bought out by the summer? Or did you invest to be eventually be bought out?