Here's hoping they do like in the first game, where a playable character and quests were locked-out for those who didn't back the game on Kickstarter, above a certain amount.
Always a great idea to lock those unaware of a crowdfunding campaign, or unable to back, out of experiencing such significant piece of content.
People talk about major publishers, and practices such as pre-order DLC, or retailer exclusive content (and rightfully so, since these are appalling practices), but some "indies" are doing a great job going in a similar direction, by making content exclusive to crowdfunding campaigns. Some have a bit of decency, and make the content minor/cosmetic. And then there are games like Expeditions: Conquistador, which was one of the worse offenders.