Any and every chain, so long as it is mutually beneficial and viable. But the focus is South Korea 1st. ICON already has blockchains running. One for a handful of hospitals, another for some universities (3, expanding to 13 hopefully by end of this year), another for some banks (5 or 6 IIRC, one of them is Woori Bank, and in development with Ripple Asia), and another chain for 25 securities firms.
These are contractual partnerships. ICON will look/work at expanding globally as soon as possibleSee full review