Konami will never sell Metal Gear due to the money they make from the pachinko sales.
Silent Hill no idea but Suikoden would be the only other notable IP they have but all of the Suikoden games sold less or almost the same as than Blue Dragon or Lost Odyssey.
I am reminded of the rumor earlier this year. Where Konami would take a cut of any remakes or remasters. And the IP ownership only applies to gaming, leaving their casino efforts untouched. I still believe in this a little bit, because otherwise Konami as a development studio is way past its prime and is just sitting on their IPs with no active development that I know of.