i have this new forge map i am working on i need some ideas for this new forge map i am making
Well for starters, what kind of map is it? CTF? Slayer? BTB? Competitive? Casual?
Is it symmetrical, asymmetrical, inversely symmetrical (think Halo 2’s Sanctuary) or Vertically Asymmetrical (think Halo CE’s Damnation)?
Once you’ve got that sorted out, what kind of “power position” (focus point that offers a better vantage point on the map than other spots) do you want players to focus on, and what sort of weapon balances are you trying to create? Do you want it to be long range, close range, hallways based, room based, open? Does it revolve around a central structure, are there clearly defined bases?
After you’ve got that idea in your head, try and look to things for inspiration on structural designs. Your map could be a letter, a number, a symbol, it could be a shape or a monument. It could be a city center, a train station, a forerunner burial ground. You could turn it into a space station, a covenant landing ground or a forested island.
You’ve got a lot of creative options for the map.
If you need help looking for ideas, try looking at the dev maps or even other forge maps for inspiration. People can have brilliant ideas, don’t be afraid to incorporate them into your design, even if it’s not your own. At the same time, try to find odd ways to piece your own unique ideas together, whether it’s following any of the ideas above or simply an idea you got from walking outside and looking at the buildings near you.
I’ll link you to a Forge Site (or former forge site) called Forgehub/Halo Evolved if you’d like to look through their map database. There are some pretty unique forgers and maps there, and it’s a great place to look if you need ideas for your own map.
The Halo Evolved map database.
Anyway, I hope this was helpful!
big team battle map
I’d like to help but I’m not sure there’s much I could do.
I haven’t been much for playing Halo as of late, but I could direct you to a friend of mine who has a healthier appetite for the game, and I think they’d be up for helping you along with it.
Might want to set your PM’s (personal messages) to Open if they aren’t already (so that I and they can get in contact with you that way instead of the thread).
PM me mate and ill help you out as much as possible, let me know what theme map and other things 
> big team battle map
Start with the basics. Bases, Hogs, and ghosts. Then maybe add a unique power vehicle somewhere on the map, like a Wrath or Rocket hog. Add snipers in bases, and make sure everything is open enough to drive in.