I also think (with emphasis on THINK) that he's bi. Just because of things he has said in earlier interviews. But I have no way of knowing either, and will never claim to own the truth in this matter, not even if he does state it eventually, because it will still be HIS truth and there will still be nuances and factors that we will never know. And it will never matter either. Mika is Mika. No matter what happens, he is Mika. Whatever he likes or dislikes, that's what makes him Mika, and that's what makes us love him.