If teaming up with Valve means that his game will get Steam advertisement then it will be really big. Seems interesting, I still think DotA is a better competitive game than HoN atm for obvious reasons. This will definitely be something to watch, if it works out I think HoN will have a hard time getting any portion of the competitive dota scene players to convert, and the competitive dota 'community' is a unique one in that its small enough for everyone to know and play with eachother in the inhouse leagues and make rivalry's but big enough to have a lot of good teams and large sponsors taking them. That said, I think its important for HoN to get some action from the top lvl dota players for the publicity and a quick establishment of high skilled tournament matches