Forerunner weapons smg,brute shot,spiker,mauler. Also Arbiter ,falcon or pelican AND ELITES PLAYABLE plus forge world
Also firefight and brutes back and a Sgt. Johnson AI. Choppers or prowlers would rule and shotty snipers! And map wise pit,sand trap, blood gulch, Countdown. And bring back Objective game modes like 1-flag or assault. Make Flood more like Infection