Driveclub developers Evolution Studios have outlined their DLC plans for Driveclub over on the official PlayStation Blog. The highlights include a free car per month until June next year (9 in total) and 11 free tracks. In addition to this and a dynamic weather systems and photo mode (both free updates), there will be tons of paid for DLC as well - car packs (38 cars in total), tour packs (176 events) and livery packs (80 unique liveries). All of this is planned for the next 12 months (as detailed in the graph below).
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As you'd expect there will also be a Season Pass with all the paid for DLC included (€29.99), which will save you a whopping 60 percent on the regular PSN prices of the individual DLC packs.