NBC has just released the first teaser for “The Tonight Show starring Jimmy Fallon.” All the past hosts are included. There’s even a nod to Conan O’Brien, who had a brief run was treated badly by NBC under its old regime. But this is classy– and you can see Jimmy’s fingerprints all over it. Conan is a friend and mentor, as well as a past writer of “Saturday Night Live.” We’re going to see a kinder, gentler Tonight Show with Jimmy Fallon. Bravo!