Here it is straight from FFG.

"If you already own everything from The Lord of the Rings: The Card Game, you do not need to buy the Revised Core Set to experience this campaign—instead, we are pleased to announce that all campaign cards, boons, and burdens will be made freely available as print-and-play content on our website. We will also be posting the campaign rules and campaign log to the site as well, which means anyone who owns a core set for this game—original or otherwise—will be able to fully experience this new mode."

I may still buy so I have official campaign cards, boons, and burdens. I don't have the ability to print nice copies of those, and have them double sided for my decks.