Given that proportional to user base Halo 2 is the most successful Halo game in the entire franchise it's probably not a bad move to do a Halo 2 anniversary edition.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix