When will the file browser be open for business? And will their be better forge maps included in any of the new map packs coming out?
I would also like to know when/if the file browser is going to happen. Playing custom maps is my most fond memory of Halo 3 (the last good Halo until 4) and I think mapmakers could really make some AWESOME stuff with the new features introduced to forge.
I would also really like to see some of the maps from Halo 3 come back. Guardian is my 2nd favorite map of all time, and I would also like to see maps like Sandtrap, Blackout, and The Pit.
Halo CE/2 didn’t have as many memorable maps for me, although I had much less playtime in both, although, Blood Gulch/Coagulation is my favorite map.
Now to defend my position on the last few Halo games. 
ODST’s campaign just didn’t cut if for me, and the firefight mode just didn’t compare to the Halo 3 multiplayer, IMO. Reach, on the other hand, did have an ok story, but the multiplayer just felt weird for some reason (may have been the new controls) I still find myself having LAN parties in Halo 3.
No Answers here…
Some great maps in Halo 2.
Zanzibar (although they should bring the H3 version of that one back)
Terminal - In game dangers are always fun for the player who forgets to look out for them Choo Choo!
Containment - Great Big team map, great for slayer and compelling for objective based / vehicular games.
Waterworks - Great map again for big team games (you can prob guess I like big team), plus the fact you could shoot down the stalagtites(sp) to hit enimies hah.
Well those are my highlights from Halo 2 anyway
Gotta get some Guardian from Halo 3. Sandtrap would also be a good addition.