I actually think that Firefalls founder pack is rather awesome, but it wont fit at all for PS2.
As for PS2, well thats difficult.
For once, PS1 vet rewards (If you actually plan on having any at some point) and the founder pack seperated.
As for the actual content, hmm. A bunch of implants, some Station Cash, a special title. Thats the basic pack right there. Then maybe some gold plated weapon and armor skins (i would love to be a golden Max.
), maybe even Gold skins for some vehicles ( a golden Galaxy?).
Cant think of anythign else really. In any way, it shouldnt affect gameplay, means no new weapons or vehicles or something.