I saw the SWAT gametype in the live stream, so there’s more gametypes than you thought at first. Some hope has been restored lol, sorry if this is old. (Btw it’s at 54:30 in the video, no link sorry.)
If there wasn’t SWAT, I’d cancel my pre-order.
And no, not as some form of rebellion, but in Halo 3 and Reach, the only gametype I ever enjoyed was SWAT. Without it, MM would be fairly empty for me.
However, it’s presumed that the MM will evolve like it always has in Halo games. It will start off minimalist, for the sake of the servers or something, then they will start adding more gametypes, change and refine existing ones and remove the ones that no one plays.
It’s a safe bet that the announced gametypes are just the start of the list of possible gametype Halo 4 will have for us eventually.