That's pretty much like asking what the value of a given stock will be in two years. Nobody knows -- and if they did, they'd be gobbling up properties right and left. While you'd expect the economy and the housing market to be better two years from now than right now, nobody knows how long it will take for property values to recover, nor how fast that recovery will be.
My best advice is to look for a property that has all the inherent attributes that contribute to value (excellent location, good schools, functional floorplan, good lot, popular upgrades, etc.). As the market returns, those types of homes are likely to appreciate faster than a home that has various shortcomings or drawbacks.
A home that's overbuilt for the neighborhood generally will appreciate more slowly than those that conform to the rest of the homes in the area. Similarly, a home that's in need of updating won't appreciate as fast as others in the same neighborhood that already are a "10."
Hope that helps.
- Rod Herman