Been on both ends of stick in the past with companies that have taken over others and been taken over themselves.
Very tricky to forecast what will happen but inevitably things do change for the company being taken over, even if the purchasing company says the impact will be minimal.
I would have to say given the poor match in location of your base and the clients i would think a relocation is highhly probable.
On a positive note at least it means you get rid of that idiot boss of yours if hes the current owner, bad side is hes likely to walk away with a nice payout, but lets not dwell on that.