we have any legal recourse at this point?
In my opinion - no. If your uncle's property nett worth is approximately a million dollars it is make sense to pay lawyers to check it out. If not, don't bother. You didn't even keep in touch with your uncle - that is telling, so just give it up.
Most likely after all the hassle and costs and taxes you'll be a lucky one if you won't loose money on this venture.