Let me ask you guys something.
All previous content is compatable with this game, right?
How much does content for this game typically sell for? How much is it to buy extra outfits, levels, content packs, stuff like that?
Yes, all DLC as well as costumes/materials/objects/etc. gained in LBP1 & 2 are compatible.
Content pricing is as follows, with few exceptions (in USD)
Licensed Costume Pack (4-5 costumes, possibly stickers): $6
Licensed Costume Minipack (2 costumes, possibly stickers): $3
Licensed Costumes Individually (1 costume, no stickers): $2
Original Costume Pack (4-5 costumes, possibly stickers): $3
Original Costume Minipack (2 costumes, possibly stickers): Variable (only three examples. One contains 4 costume pieces total and no stickers and costs $1. The other two have two full costumes and come with stickers and cost $3)
Original Costume Individually (1 costume, no stickers): $1
Premium Level Kit (5 or so main levels, 1-2 side bonus levels [vs, challenges, etc.], 1-3 costumes, new objects, new materials, new stickers, new sound effects, new music, new creation tools/power-ups): $6
Small level kits (New materials, new objects, new stickers, new sound effects, new music, and likely one demo level to show off the new stuff and give you the prize bubbles): $4
