From my understanding, though being a "spiritual successor" to Ico, SotC came first story wise. And while they may continue to do games that have the same lore and mystery of their first two, it would play nothing like either nor have any direct, overt connection to the two. So direct sequels and simple remakes seem highly unlikely from these people. Which is great, it means we'll get something new from a company who's known for doing very high quality, incredibly unique games.
And usually every exclusive gets a "this would be really good on the Wii" or "when is this coming to Wii?". I'd like to kick those people in the nuts.
Indeed, if you need help, I'll photoshop you one of those "everytime someone wishes a Sony Exclusive on the Wii, God kicks a kitten on the nuts" cards.
