Well, we knew a new Halo game was probably going to get teased and sure enough, that's what led off Microsoft's E3 press conference. Halo Infinite is the next Halo title, but all we got to see was some rhino looking creatures, the Warthog driving, a few different environments, and Master Chief's helmet.
So while we didn't get much, we did get something. And they are touting a brand new engine called SlipSpace. Guess we'll have to wait a bit longer to see what the new game's about as well as the new features of the engine.