Reasons why it should be made:
-cutscenes need to be remastered
-it may reignite the entire Halo community if one the best games is remastered and renewed
-multiplayer maps and campaign would look incredible with graphics that are 10 years better (Note: If this was made it would come out in 2017)
-343 could add something cool like a firefight mode within the campaign or some kind of multiplayer scarab assault mode (which is ridiculously unlikely but it would be totally awesome)
Reasons why it shouldn’t be made (Note: not necessarily my opinions but things I noticed other people talking about.)
-halo 3 already has solid graphics in both multiplayer and campaign (even in 2016 they still look good) and it isn’t necessary to remaster it
-halo 3 has left a good taste in our mouths and if the anniversary is poor (which if it is made I doubt it would be) that might ruin our good memories of the beloved game