pre-ordering depends on who you go though,

If you go though PSN and sony they tend to take the money and put it into Limbo (for the eu at least) so that if you change your mind your refunded and the pre-order is cancelled.

For steam it adds it to your library and you have to go though there customer support to cancel pre-order and get a refund.

but do know either way you can pre-order literally 1 day before early access and still get all the bonuses.