Exactly what is up for sale is something they might not be able to comment on because it will also be up for negotiation. Like, if some buyer wants the Hitman IP but doesn't want Freedom Fighters, but SE says that they've gotta take all IOI's properties in one package... this sort of thing can be up for argument. And given that, even if IOI knows full well that the Hitman IP is on the table and any buyer will be likely to take it, it still might be something they cannot publicly comment on.
Maybe it'll be made public. But even if we don't hear anything, I don't think it's necessarily a cause for worry.