Wrongful termination

I worked for a bio-tech company in NY, which relocated to MA. Some of us were offered to relocate and given moving expense money and a cost of living increase in pay. The relocation occured in April. I was told a particular technique I am skilled in was greatly needed and the main reason we were relocated. After I arrived and began working, myself and fellow NY co-worker were stripped of our responsibilities with this technique, told we were basically unqualified to perform it and leadership of this technique was given to an existing employee who never performed it before our arrival. She was then given the duty of training us. The other existing employee in our lab was made supervisor, there were only 4 of us and 2 were put in charge, the 2 that were already there. Obviously, this caused some friction in the lab. Never a confrontation, everything remained civil, but over time my coworker and myself were given less work to do until we got to the point of no work. We sat at our computers for a month while the other 2 existing employees were given all responsibilities and promoted. This all occured over a 3 month period of time. Now, after returning from vacation, I was told my position was no longer needed because the company is downsizing due to financial difficulties. There are at least a dozen other employees released also. I have reason to believe the company is preparing for a buyout from another company, hence the reason for the downsize. They offered me one week pay and 10 days of continuing insurance coverage. The only reason I am here is for this job. If this buyout occurs or doesn't, do I have a case for wrongful termination and is there anything with the relocation and 3 month history issues that would help the case?