NOT LEGAL ADVICE
1. There will be no effect on your royalty ownership. As far as your royalty stream of income, you might experience some delays in payments as whoever pays you can't just cut a check, they have to get approval from the Court.
2. Not that I can think of, maybe somebody else can think of something.
3. The original Lease will not be affected in any way, it remains a legitimate, binding contract in every way based upon the original terms (or as amended by both parties), and the Lease will be perpetuated and owned by whoever buys it from the Bankruptcy Court when they liquidate the assets.