Probably not a new idea, but just thought I would put it out there. Similar to the recent Esports World Cup event - has Valve considered a similar event with a TI style / vibe / atmosphere for their premium games - 2 or 3 weeks of TI/CS:GO/Deadlock and maybe some other games could be a really interesting showcase both of the games, their players and give opportunities for value to bring new games into the public consciousness - like deadlock.

I think it's clear that some of these games have a dedicated following but this exposure could bring new interest into the games - I've enjoyed Dota 2 TI since TI2 - I've recently started watching competitive CS:GO and have friends who rave about Deadlock, love TF2 or discuss other steam exclusives.

If you couple it a compendium commitment for each game being played at the TI that year, it would potentially create a lot of interest, increase prizepools and prestige, and arguably give valve an extra revenue source. It also sets up TI as a 'Valve' event rather than a 'Dota 2' event which would give them a platform moving forward to promote their games and brand - similar to Blizzard's Blizcon event.