Okafor and picks will definitely be involved. I hope Suns don't give up Alex Len.
The Suns are 29-18 through their own merit - and this is without Bledsoe. The Suns don't have much of any reason to surrender any of their assets outside of draft picks just for Gasol; they're doing perfectly fine without him. Not to mention, his contract is expiring, he's 33 years old with a lot of mileage, he's got an injury history, and there's no guarantee he'd stay in Phoenix past this season, so why compromise their future by getting rid of their prospects for what could amount to nothing more than a rental?
It'll probably end up really similar to the Deng trade: Okafor, conditional first-round pick, and maybe a second-round pick or two for Gasol.