PlayStation Store survey outs possible customer incentives when pre-ordering titles
Sony has released a survey which contains possible customer incentives when pre-ordering titles from the PlayStation Store.
Posted by wotta on NeoGAF, incentives listed include in-game currency, single-player items, day-one unlocks and more.
Other incentives include a free game, with ThatGameCompany's flOw mentioned, Killzone: Shadow Fall mentioned.
Choices also include early access to betas and extra content releases.
You should have look through the link as Joe has posted screencaps of the survey.