Starwood Hotel & Resorts has been on the block for months, but its sale to Marriott International is something of a surprise. In a letter to its hotel owners, Starwood's interim CEO Adam Aron assured hotel owners that the deal will be positive for them once it becomes official in mid-2016. Because of the asset-light strategy of the modern hotel business, it's important for hotel chains to keep owners happy lest they sign operating agreements with other brands. Here's the text of his letter.