Here’s some CTF gameplay on the new map Solace.
The CTF gameplay above shows off the Incineration Cannon, which looks pretty awesome!
Here’s another video, this time it’s CTF on Exile.
Here’s some Infinity Slayer on Exile. Look’s pretty cool.
Here’s some Dominion gameplay on Longbow.
Will edit this post if anymore Halo 4 gameplay’s come into town.
Meanwhile, enjoy these multiplayer videos and this gif of the Incineration Cannon. 
I’ll finish watching the other videos but…dat Incinerator Cannon. Looks like the mini explosions have the potential to get extra kills after the first shot. ;o Looks pretty damn cool.
> I’ll finish watching the other videos but…dat Incinerator Cannon. Looks like the mini explosions have the potential to get extra kills after the first shot. ;o Looks pretty damn cool.
Looks like the Incinerator Cannon fires in a T shape. Josh Holmes also said in the first link that everything in it’s way gets incinerated, hence the gun name. 