This just reads as, "Konami is willing to sell MGS license. Could Microsoft be interested?"
It just seems like a really dodgy rumour to me, for two very big reasons:
1. Sony are readying to shoot a Metal Gear movie. Doesn't this show a significant interest in the IP? And that being the case why would Konami want to sell it now, when its likely to reinvigorate the franchise?
2. You can bet your ass that Kojima would be interested in a MG movie and equally be disinterested in a MG game! He spent years trying to escape the franchise, so why would he want to re-involve himself at this point when he's finally free?
The whole idea is absurd. If Kojima wanted to do an ersatz MG game, the template has already been set by Igarashi and Bloodstained! He doesn't need the IP because his name is always going to be associated with Metal Gear anyway.
So, Kojima is supposedly going to go to the opposition in terms of the people making a MG movie, possibly jeopardizing that in the process, to get back to game series he spent a decade trying to get away from? Yeah... riiiiiiiiight!