Greg Abel (right) is Berkshire Hathaway's new CEO. Bloomberg/Getty Images Berkshire Hathaway's annual meeting is next week, but Warren Buffett won't be hosting. New CEO Greg Abel will welcome tens of thousands of shareholders from across the world to Omaha. Berkshire gurus want Abel to share his plans for stocks, businesses, cash, and leadership. What is Berkshire Hathaway without Warren Buffett in charge? Tens of thousands of shareholders are hoping to find out when they descend on the legendary investor's hometown of Omaha next week. They're making the pilgrimage to attend Berkshire's annual meeting , dubbed "Woodstock for Capitalists" because it attracts a huge crowd of like-minded investors for a weekend of learning, networking, and celebration. But for the first time, Buffett won't be hosting the gathering. Instead, it will be Greg Abel , who took over as Berkshire's CEO at the start of this year, marking the end of the business icon's six-decade run.…