Absolutely nothing you have posted makes me care about this project. That "Beam Cannon" looks like it took all of 30 seconds to extrude in Max before you slapped a completely random texture onto it and called it a "gun".
From what I can tell after reading your posts on HaloMaps and Modacity, you and your team are much to young and inexperienced to even try and take an a total game conversion mod. The closest anyone has seen are the maps CMT made for Halo Custom Edition, and even they just remade the normal Halo PC campaign for Halo Custom Edition with a few changes and improvements.
You on the other hand would need an entire team of DEDICATED individuals to finish this. What you have is a mishmash group without a plan all working on some random bits of custom content and hoping that it will result in something awesome.
Here's my suggestion of how you proceed if you really want to do this:
1) Come up with a script, a story about how "Halo 4" will take place. Come up with characters, personalities, profiles, back story, etc...
2) Ask for critique on that script, because what you posted, about landing on the Sangheili home world is complete crap.
3) Take your entire story and think about the best way to split portions of it up into specific levels. Generally, each level is either a completely new physical area or a continuation of an area after something dramatic to get to a new area. Just look at how the existing Halo games do it.
4) Get someone to start modeling the terrain for these maps. They're single player levels so they're going to be substantially larger and more detailed than multiplayer maps. I suggest starting with the first one and working your way up in order. This gives you time to texture, populate, and fine-tune a level while your modeler is creating the next level.
5) Work on your cinematic cutscene's with temporary voice actors, even the same person voicing lines in a general way you want them presented.
6) Present the above on YouTube or something, ask for volunteer voice actors to suit the roles you want. Start working on proper voice acting.
7) Finish polishing off your first level. Get the textures finished so the texture artist can move onto the second level if the modeler is finished creating it.
8) Present your first level for critique. If it's accepted then continue your work. If it's not, stop everything and find out what you failed at. Start over from where you failed. It's -blam!- but if you want to make a decent mod that people will actually enjoy it's necessary.
Try that and get back to us, judging by what I saw of you at Modacity though you're just going to ignore all the advice we give you. Then when you ask why no one is giving you good advice and we tell you that we have, and they you're completely ignoring us you're going to insult us.
Then comes the excuses that you can't take critique because of where you live, and because you're so proud. Seriously man, what the hell is that?