To be honest, I don't see the point in having a "good poker player" here. We're planning a friendly get-together, and this person will probably come to make money, especially since no one knows him and no one can vouch for him. We're having a Heroes event, not a poker game.
It's up to you, of course, but it's wrong to push away someone who's interested in Heroes, especially considering that someone always brings an unknown friend to each tournament, who doesn't even know what Heroes is.