Here are some of the highlights

• Zone Of The Enders HD, will be releasing for PS3 and Xbox 360. Also it has a new opening animation (See Below).
• The Metal Gear franchise has been around for 25 years. Snake has come a long way huh? Metal Gear Solid HD Collection will be coming to 360, PS3 Vita and Metal Gear Solid 3 will be ported to the 3DS.
• Metal Gear Rising has a new trailer that's pretty amazing, and bloody. It will be released early 2013. You will have 100% complete control over Raiden's katana. The game takes place nine years after Metal Gear Solid 4. E3 will have a playable demo.
• Castlevania: Lords of Shadow 2 has been officially announced with a truly stunning, breathtaking and epic trailer. In the trailer we see Gabriel older and more "vampiric." I believe we see Alucard as well? I am not entirely sure though.
• June 5^th will have more information on Castlevania: Mirror Of Fate for 3DS.

Of course more general news and updates when E3 officially starts.

Also, here is the entire Pre-E3 show, so you can see for yourselves if you wish for more information, or anything I may have missed.

Konami's 2nd Annual Pre-E3 Show