Okay, come on now, guys.
Let's be mature about this.
LouiseEdogawa:
The chance is not zero- there is always a possibility for everything- and while the chances may be slim that does not mean that they do not exist.
Their relationship has hardly developed since the series began- aren't they at a stalemate right now because of the London Arch? I could be wrong, I haven't seen the newer episodes. I've been tied up in Game of Thrones and Bioshock. XD
We were not making it seem like he is a play-boy. If he were to stay as Conan, it is only fair for him, if he truly loved Ran like you claim he does, to tell her to move on. Whether or not she does is Ran's choice. But he would need to tell her he isn't coming back. As it is it's awfully not very loving of him to keep her waiting like this. Sacrifice is needed in a relationship. I believe Ran may really love him (she's sacrificed quite a bit of her youth on his butt now, hasn't she?) but I don't believe he truly loves her. We do not wish that Ran will die, she's not my favorite character, but I won't wish for her death. That's immature and just... fangirlish. I've said it would be good for the story, before, it would make it interesting, but Gosho would not do that and I'm not sure I would want him to. It'd cause fans a lot of heartbreak and probably ruin his entire show.
Even if he wasn't loyal to Ran he wouldn't still be going out with Haibara. You, yourself, have just painted him as a playboy, there. That would be extremely out-of-character for him. I don't think the AiCon fans would even enjoy it if that's how their couple got together (well, the ones that know what good writing is...).
That last part is debatable. You can't help it if you fall in love with somebody else, so that may eventually happen to him, but the notion of him acting on it might freak him out for a while.
Hobogoblin2012:
How are you so sure that Ayumi has no chance?
Haibara, if she has romantic feelings for Conan (I don't think she does. I think it's more a best guy-friend ordeal.), hasn't said anything yet.
Ayumi has.
Conan recognizes that Ayumi has these feelings and he hasn't said anything to her about them. He isn't encouraging her but he isn't discouraging her. If he truly didn't care about her affections, even if it made the group awkward for a while, he'd at least be able to break it to her slowly, right? Now I'm not saying they should run away and get married right now, but if he doesn't say anything to her or reject her, that sort of thing could grow slowly in time.
Okay, let's not be mean to Genta.