If you played one of the previous single player games that turned into an MMO, you know that it was going to suck, here are the 2 games i can think of
- Star Wars KOTOR
- Elder Scrolls
Making a Halo MMO would ruin the entire story, just like it did to ES and KOTOR because there MMO's, think about it, you play a single player game and its great, but when it turns into an MMO it sucks, why, well because all of the mmo's play like Wow, SWTOR plays like Wow, and the ESO play like Wow, also when theres an mmo theres repetitive quest as well, the only mmo game that doesn't suck is GW2, and its still happening every MMO is still becoming like Wow, my recommendation.
DON'T BUY SINGLE PLAYER GAMES THAT TURNS INTO A MMO.