Based on the provided legal document, the key points are as follows:

1. The court emphasized that a person who merely expects to obtain a lease in the future, contingent upon the dismissal of a suit, does not possess any semblance of title or interest in the property in dispute. Such an individual cannot be considered a necessary or proper party in a suit for specific performance (!) (!) .

2. The distinction between necessary and proper parties is clarified: a necessary party is one whose joinder is essential for the court to pass an effective decree; without such a party, the suit may be dismissed. A proper party, while not necessary, is someone whose presence would enable the court to adjudicate the matter fully and effectively (!) .

3. The court held that the appellant, who was neither a purchaser nor a lessee of the suit property and had no current right, title, or interest therein, was neither a necessary nor a proper party to the suit for specific performance initiated by the first respondent against the Airport Authority of India (!) (!) .

4. The appellant's claim that it was in possession of a pending court order demarcating the land and that this land might be included in the lease in the future was insufficient to establish a right or interest that would necessitate its joinder as a party (!) (!) .

5. The court reiterated that the mere expectation or potential future interest, especially when the individual does not seek relief against the plaintiff nor the defendant, does not warrant their impleadment in a suit for specific performance (!) .

6. The discretion to add or strike out parties under the relevant procedural rules is to be exercised judiciously, considering the facts and the interests of justice, and not based on speculative future rights (!) .

7. The case reaffirmed that the primary criterion for joinder is whether the person is a necessary or proper party for the effective and complete adjudication of the matter, which the appellant did not satisfy in this case (!) .

8. The appeal was ultimately dismissed, reinforcing that a person with only a future expectation of acquiring rights, without current legal interest or relief sought against the plaintiff, cannot be joined as a party to a suit for specific performance.