Destiny has around 2.6Million pre-orders. Gaining about 100k weekly. The 100k will most likely jump to around 500k for the last week of pre-ordering. So figure around 4million sales day 1. This game will be on the list of best selling games day one. Your cancelled pre-order means nothing. You will account for a 0.000025% drop in sales. No one cares.
Considering bungie just re-tweeted that the timed exclusive content is now only available on the ps, I'm considering at the very least not picking up the DLC. Hopefully the tweet was just a marketing typo.