Most likely outcomes:
Conversions to emo
Slit wrists
Boredom
User-Database shrinks profusely
Extreme ammount of servers die out
Noone plays
Boredom
People need to find a new game
Forums left desolate
Boredom
Less money for Badspot
Boredom
Useless add-ons and bad maps
Boredom
Boredom
N00b populous grows
Boredom
Boredom
Boredom
...
Yeah, exactly.
Or Apocalypse. Think about it. Have you ever heard of really good games turning stuffty for online play? This is the worst case scenario. Badspot stops alright? He'll know that millions of people play the game, and love the online server. That means he'll hand command over to another person from the forum and the online master server, all the way to the website for the whole game download.
Some people wont notice the difference and then stuff will happen. This stuff might be that the new owner is a giant douchebag that is really nice. (Mormon, Lady or girl, Some really stupid handicap. Feel free to kill me about the mormon part.) They'll change the server, put in swear blockers, and people will be so enraged that they might even piss on their own computers and maybe even commit Self Delete.
THAT'S THE WORST CASE SCENARIO!!