Good old Konami, it's got its corporate head around social gaming, it really has. You can see this with this trailer for phone-based MGS.
Verge points out, from the floor of the Tokyo Games Show (TGS) that:
"...if you're looking for the sort of tactical complexity from games like Metal Gear Solid: Acid, you should probably lower your expectations for Social Ops. But, for diehard Metal Gear fans, just having a guy named Snake is usually enough to justify a download. Metal Gear Solid: Social Ops is planned for release on Android and iOS later this year."