Sources revealed Thursday that bidding would start in earnest on Hulu's self-sale late next week. Potential buyers are expected to make first bids worth "at least" $1.5 billion for both Hulu itself and the content deals it has with three major TV networks. The AllThingsD tip warned the price could drop if Hulu's management doesn't want to reduce its stake or rise if a buyer wanted a longer license than what Hulu has today.