I have been looking and working on a map thats based around the gametype extraction. Thing is im trying to set the map up to where only one team can process and plant the extraction point to continue rather than allowing the other team to convert it. Is there a way to prevent the other team from converting it and just simply disarm it?
I have been playing with the same thing for quite some time. I do not believe there is a way to do what you want sadly
You can change the team setting at any given extraction site, but this doesn't seem to keep other players from extracting it. You might be able to use KOTH and tweak the game settings to incentivize hill points for one team and kill points for the other team. You can have several hills, and you may be able to simulate the feel of an extraction game variant, with one team trying to hold the hill rather than an extraction site.
You know that 343i/CA could come up with a game type for a campaign style game (which is what invasion was), but the problem will be the maps. If you want a game that has the depth of invasion, the investments they would need to make for the maps would be a magnitude greater than any other game type. Dominion was a cheap fix for the invasion junky, and I honestly think it failed big and is incredibly simple to forge for. Put yourself in 343i's position and ask yourself, "Why would 343i make such a huge investment into a game type when the Invasion playlist population for Reach was so small, and the percentage of players playing the invasion playlist that actually grasped the depth of invasion was even smaller yet?"
Well they dont need to have it in MM but have it for us forgers and those who enjoy customs. Invasion overall was a good thing because of the things you could do.