TDN's Senior Racing Editor Steve Sherack provides analysis for this weekend's trio of GI Kentucky Derby preps--Saturday's GII Coolmore Fountain of Youth S. at Gulfstream Park and GIII Gotham S. at Aqueduct and Sunday's GII Rebel S. at Oaklawn Park. GII Coolmore Fountain of Youth S. - Commandment (Into Mischief) is a deserving favorite and the horse to beat in this absolutely loaded renewal of the Coolmore Fountain of Youth. He kicked off the New Year in style, splitting horses at the top of the stretch en route to a...