The easiest way is to just place some altars at the player's start location, and have the player buy a hero of their choice at the altar.
An alternative way is to place a bunch of heros on the map with circles of power near them, and give each player a 'chooser unit'. When the chooser unit moves onto a circle of power, that player gets to use the hero associated with that circle.
I do know this - xenforo dropped the ball by not keeping the vbulletin reputation comments as a feature. The loss of the Reputation comments data when we switched to Xenforo really was the death knell for the site when it came to all the users that left. I know I missed it so much and I got way less interested in the site when that feature was gone and I run the site.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory