I, USA resident, was contesting a court case about inheritance against my brother. He had made a registered will by my mother just two week before her death. She was in an advanced stage of terminal cancer. The court has declared that the will was made under suspicious circumstances and therefore it's is null and void.
Question:
1. What are chances that higher court will reverse the decision the lower court decree?
2. The court case took 4 years. How much time, in general, will the higher courts take.
3. How hard and how long does it to take possession of residence house where my brother is living?