i have a couple of good ideas about halo wars 2 if it does happen. there is alot of debute over if they'll make halo wars two because of the trilogy which is a very good point but anyways:
1. they should fix up the glitches and patch them up in matchmaking and over all.
2. also update the vehicles and units like the flamethrowers change them into snipers or u can at least upgrade them to snipers.
3. make it so that u can go into first second or third person views that would give halo wars a whole new meaning. like imagine three people in these three different views or at least let each player go into first person view with any one character or vehicle they like.
4. add all the different new vehicles or make upgrades so u can get each different vehicle.
5. change the base set up. i mean at the beginning of the games u shuld be able to choose with the one scout where ur base can go and u should be able to build it anywhere. i don't know but the way star craft set their base builds is what i'm talking about if anyone knows that game.
6. u shuld make it so that u can get more than three stars on ur units but it will take a while.
7. lets u upgrade ur marines odst's or spartans have amor abilities such as amor lock and cloack things like that.
8. change how some units can't attack air, i think all units should be able to attack air. though some will deal less damage than others.
9. enable tanks to shoots with their canons at air units.
i'm a unsc player but the covenent units were pretty good though can also be emproved will post tomorow