Jhonnykiller45
Shirai Ryu
I dunno man, Alfred also says "he said you'd come" 'he' presumably being Batman. How would Batman know Superman's coming back? We as the audience all know it but the characters in the movie probably wouldn't.Guy at the end is definitely Superman. He said "let's hope you're not too late" or something like that. I love him but GL wouldn't be able to turn the tide if someone like WoWo wasn't getting it done. It would have to be someone as powerful as Superman to be an actual game changer.
Other than the fact that they were building up to Superman the whole trailer, it seems like they are going with the newer versions of the characters (New 52 especially with Geoff Johns's invonvlement) and any Green Lantern wouldn't be a game changer for a losing battle like that.
I feel you're also really underestimating Lantern's power but that's another subject.