Sorry, but it is small in the gaming world at large. Even though EVO is THE GIANT in the fighting game community, it is still for a niche genre (like it or not fighting games have become a niche genre).
Whatever you say man. Trolls. I'm pretty sure some are just arguing to argue. You can believe what you want. EVO is the de-facto fighting game tournament, always has been and always will be. MLG actually has less viewers both in person and online than does EVO (based on twitch stats) and EVO is a one time event with prizes exceeding 30k IIRC. It draws players from ALL OVER the world, and they all gather yearly in Las Vegas by an event created by the Cannon brothers (I know them) - this tournament has been run on a yearly basis for over a decade now.
If you're clueless, by all means, continue thinking it's a niche. MLG is for other types of games. They won't touch fighting games because EVO is the de facto tournament for fighting games, period. Does MLG do Injustice? No. SF4AE? No. MvC? No. Evo is the standard for fighting games, the biggest in the world with the biggest prizes, biggest attendance, and most online viewership. Last years event had 300k simultaneous viewers from all over the world watching the stream. MLG does not even approach that with their nonstop incessant SC2 reruns. In fact, I went to a MLG event In Raleigh, NC a couple of years back and I was shocked. Because the venue was empty in comparison to what I expected. It was pathetic and poorly run. I'm not saying MLG isn't big, but it is for different genres. They don't do fighting games.
I won't bait the trolling anymore, or the arguing just for arguing sake. Any tournament-minded fighting game aficionado knows about EVO. If you're completely freakin' clueless on the fighting game tournament scene, maybe you think it's a niche. All of the SF4AE tournament players know about EVO. All of the biggest names in fighting game tournaments know about Evo. Chris G., Justin Wong, Fuudo, infiltration, these are the top players in the world. Ask THEM if they think EVO is a niche.