Oh, I thought you were going to bring up some current proof that shows it wouldn't be likely.
In any case, all that really does is show that Cassie used to be very much in love with Conner, and maybe it was a bit unhealthy in some regards. I'm not really saying much of anything, but since Conner has been back it's not like Bendis or anyone has touched on his sexuality.
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I'm not saying Tim will date Conner or that Conner will be queer too, but it's something to think about. I mean, Bernard seems like a fine young man, but lets be real: he has no powers nor a hero identity, and Tim has no book he's regularly showing up in (unless Legends is supposed to continue with this story?), so Bernard's visibility potential is fairly low. It would make more sense to me if Tim dated a hero.
But like I said, I'm not saying that it has to be Conner. I'm honestly thinking Matt Price is a possiblity.