Already Out:

Crush (PSP)

Moero! Nekketsu Rythm Damashii: Osu! Tatakae! Ouendan 2 (DS Import)

Rest of June:

Resident Evil 4 (Wii) June 19

The Darkness (360/PS3) June 25- getting PS3 version most likely.

Pokemon Battle Revolution (Wii) June 25

Ninja Gaiden Sigma (PS3) June 26

Final Fantasy Anniversary Edition (PSP) June 26

and maybe a little bit of this:

Overlord (360) June 26

July:

Manhunt 2 (Wii/PSP/PS2) July 10- getting Wii version

Possibility: Project Sylpheed (360) July 10

Guitar Hero Encore: Rocks the 80s (PS2) July 17

Parappa the Rapper (PSP) July 17

Final Fantasy II Anniversary Edition (PSP) July 24

And maybe some of this:

Shin Megami Tensei: Persona 3 (PS2) July 24

Mario Strikers Charged (Wii) July 30

Guilty Gear XX: Accent Core (Wii) July 30

Maybe some of this:

Two Worlds (360) July 31

August:

Lair (PS3) August 7

Jeanne D'Arc (PSP) August 7

Heroes of Mana (DS) August 14

Metroid Prime 3: Corruption (Wii) August 20

Bioshock (360) August 21

Stranglehold (PS3/360) August (no official box art yet)

Blue Dragon (360) August (unofficial boxart)

Couldn't find some suitable sizes for pics of some of the box covers, will replace them when I do.

Some of these covers look freakin' sweet like: The Darkness, Final Fantasy I and II, Super Mario Srikers Charged, Manhunt 2 and Bioshock.

21 Games to buy and 3 under consideration... It's going to be a busy summer.

Indeed. There is certainly no summer drought this year.

It appeas Spring was kind of the drought period as Wii and PS3 didn't have too many big games come out and 360 had a few compared to the summer that's coming up. 

This year is so packed with big games it's crazy. 

Overlord looks like it'll be extremely fun.

I assume you are getting the PS3 version of Stranglehold due to the blu-ray packin, but why are you getting the PS3 version of The Darkness?  Just curious if there is a particular reason.

Also, what are the details on Guilty Gear XX: Accent Core for the Wii? That's my favorite fighting franchise. It speaks to me.

Gamecube controller?...oh wait...is it a beat-em-up? I should look this up...

Edit:  Ahhh, classic controller or wiimote/nunchuck.  Interesting.  I'll have to read the reviews.  All I have is the PS2 version of X2, so I missed the Reload that was online for the xbox.  I assume this one won't be online either, though.  *sigh* 

Nice list, I like most of your pics. But, what about SSB:Brawl or SMGalaxy or GTA or Halo?

Summer only, as per the title of the thread.

GREAT job ckmlb! I expected nothing less out of you! *wants every game on the list*

 Summer my friend, don't even get me started on Fall.. wayyy too many games then lol

 Trying to help PS3 software sales honestly LOL