So by now you already have a good guess on what games are going to be showed, that sony and Nintendo will trot out the new hardware, many studios making massive unveils of known franchises, some showing new games but here is the question

What out of anything that might be shown, would make you disappointed at a game/developer/trend?

Battlefield 3 not being what it should be 
 
i'm gonna strangle a stone brick to fucking death

If Nintendo's new console is remarkably bad.  If the specs are not as good as the PS3 and Xbox 360, if there are terrible games shown, if the console is over $400, if there is no hard drive and/or if the controller is over $150.

If either Sony or Microsoft announces a new console. 
 
That or 3D is still being pushed. 

Fable 4.

Battlefield 3 Paid SDK. I will kick a baby across the street.

I'd be disappointed if there wasn't any Guild Wars 2 footage, or even a beta release date.

Developers still thinking 3D and Motion Controls is what customers what.

Battlefield 3 Paid SDK. I will kick a baby across the street.

"Unannounced Nintendo Console" totally just being Wii HD. Actually, ANYTHING to do with motion controls at all.

Well Valve said they wouldn't be showing up at E3 so there's really nothing that can disappoint me this year.

If Reggie pulled out his piece and fired it off into the audience.

If EA announced Mirrors Edge 2 as cancelled.

Sequels. Everywhere.

@LordXavierBritish said:

If Reggie pulled out his piece and fired it off into the audience.

How any of that is disappointing?

oddly nothing

Every year I wait for a new console Syphon Filter to be announced, and I'm usually disappointed.  That...and a sequel or remake of Legend of Dragoon.  I've far accepted that it will not happen.

I think my most disappointing thing already happened. I was really hoping to see DotA 2, but Valve has said they won't be there. E3 week is one of my favorite weeks of the year though, so I'm sure I will get over it.

If someone announces a Twilight game and if the crowd cheers for it.

A Halo HD announcement would be disappointing but an announcement of a Halo 4 with the MC returning would probably cause me to have serious depression.

Prey 2 is the game I've been waiting decades for. A game that sort of emulates the space bounty hunter domain, with a Blade Running/Star Wars aesthetic.

Referencing Star Wars Episode 2 is blasphemy, but the initial assassin chase sequence in Coruscant is something I always wanted to see in a game. That and the scenes of New York in Fifth Element have always been interesting areas to explore in an open world game.

I really hope it delivers on depth, immersion, atmosphere and substance, things that E3 CG trailer seems to be selling.

I'm just worried about its ties to Prey 1, albeit limited; I didn't care at all for the first Prey.

@LordXavierBritish said:

If Reggie pulled out his piece and fired it off into the audience.

Project Cafe being super expensive/ ugly

Nintendo not revealing any planned titles for the new console

ME3 not being mentioned or looking like shit (I will cry, I will seriously tear if this happens)

Microsoft reveals its working on a new console and that they are doing away with achievements (this is of course an infernal scenario)

Hmm... Arkham City delayed?

If either Sony or Microsoft announces a new console. 

A lack of Guild Wars 2, The Old Republic, Mass Effect 3, Arkham City, Prey 2, Skyrim, Bioshock Infinite, or Kingdoms of Amalur: Reckoning. 
 
These are all basically guaranteed. But I want copious amounts of all of them.

@Ahmad_Metallic said:

Battlefield 3 not being what it should be i'm gonna strangle a stone brick to fucking death

They lied about 32 v 32, it's only 8v8, the "Gameplay" they showed earlier was fake and it looks graphically similar to CoD. No dedicated servers, half the maps are indoors and no vehicles, and it's xbox lead, not PC. In fact, the PC is going to come out 2 months later than the console versions.

If they screw up ME3 - I think that's the only thing I know being shown that I'm already invested in.

-If Skyrim gets pushed back. 
-If Peter Molyneux announces Fable IV and begins his speech by saying "I think there's something fundamentally wrong with Fable." 
-If Microsoft doesn't announce any new-IP first party non-Kinect games (which it won't of course, but here's hoping)

No BF3 Multiplayer footage or playable version on the floor.

"Fruit Ninja Kinect" would be pretty fucking bad 
 
oh wait.

@ShaneDev: it's seems to be your lucky day!

NGP being named PS vita. 
 
oh wait.... (and lets not even talk about AT&T)