There's no possibility of that ever happening. Germany and Poland signed a treaty on the issue decades ago
Not exactly. The most important paper on this subject: the 1953 Bierut's Act is not technically valid* and leaves a lot of room for a good lawyer to make a case.
And another important paper which is sometimes mentioned, that is 1990 Treaty of Good Neighbourship between Poland and Germany
doesn't apply to this case since it only touches the subject of the borders, national minorities, and cultural cooperation between two countries.