Hi
1) A caveat is only a plea made by the party to the dispute that the Authority should not decide the matter without hearing the person who filed the Caveat.
2) A Caveat is valid only for 90 days from the date of filing. After that the Caveat automatically expires.
3) Actually your uncle's son is making you file a declaratory suit by your father and uncle against him(uncle's son) in court of law and get the property entangled in court litigation.
4) If you wish your father and uncle can file a declaratory suit in the civil court and claim title.
5) Another alternative to litigation can be Lok Adalat which is a mediation process.
6) In a proceeding before lok adalat, the parties are encouraged to sit across with the judge and put forward their claims and the judge will decide the case at the very earliest.
7) In lok adalat, the process is faster, purely based on facts of case and cheaper(no court fees, no lawyers are required etc)
8) The orders of lok adalat are equivalent to orders of court and in cases of compromise decrees passed by Lok adalat, the same cannot be appealed in Higher courts.
Hope this information is useful.