About a month ago, I made a thread asking what sort of bosses they’d like to have in the Halo games. It was fun! But now I’m wanting to hear more ideas from you all, so here we are!
This time I’d like to hear what ideas you have for a campaign level. What happens in it? Where does it take place? Are there any bosses or mini-bosses we’d have to fight? Your imaginations the limit! 
I’ll start:
'It is split into three parts. First part takes place in the base, the second part in the air, and the third part on the ground.
The levels starts in a UNSC out-post. You’ve just completed a certain mission (the previous level) and have given your report, and are about to head back to the Infinity. Suddenly, Shots seem to ring out. The Storm Covenant is raiding the out-post. First you must despatch of all the enemy forces here. After clearing the base, you get a call from the brigadier stationed there, telling you to come at once. When there, you find that the enemies you’ve just defeated where only a first wave. There’s a Covenant Super-Scarab heading towards the Out-post! This out-post has a lot of important data, which CANNOT be destroyed or taken by the enemy, so you must protect it at all costs. The brigadier orders you to take one of the Shortsword fighters docked at the hanger, and along with other pilots, bring the fight to the Scarab before it reaches the base.
Outside would be a large mountainous area, and banshees are flying around the super-scarab as an escort. The objective: You are leading an air strike with Shortsword fighters to destroy the super-scarab. The super-scarab is much stronger than a regular scarab, it has stronger armour, and much stronger weapons. There are UNSC ground forces, but they aren’t much help.
The weak points would be the legs, (as usual) and the main cannon at the front. While you can eventually disable the main cannon by inflicting enough damage, it is dangerous as one clean hit from it and you will be killed!
After doing enough damage to it, it will collapse, but the weapons are still functional. You now will have to land and board the super-scarab and destroy the core. Since it’s other weapons are still in working order, you have to land a distance away from it. You decide to drive a Warthog to get back to the Scarab.
This part will be much easier if you destroyed the main cannon while in the air, otherwise the cannon will still be operational and will fire at you, making the journey to it much harder. A couple of Wraiths and ghost will try to stop you from reaching the scarab. After reaching the super-scarab, you will then have to board it. When onto the scarab, you will have to find the control room. After defeating the guards and other enemies on board, find the control room and destroy the core. You then have 30 seconds to get out and drive away as quickly as you can to get out of the blast radius…
BOOM! The super-scarab is destroyed! The brigadier congratulates you, and orders you to return to base.’
Now, how about you? What are your ideas?
Please be respectful of other people’s ideas though, as we all have different opinions. 
Just don’t send Spartan Thorne there.