wehn Happy days and LAverne& shilrley were stiill on abc and Happy days was over then closing music was going on I know taht most times the announcer jsausted said stay tuned for Laverne& shirley Next here on abc but did they ever sya now stay tuened as such and such Happens Next on Laverne&shilrey instead of just saying stay tuned for Laverne& shilrey next here on abc?

I wouldnt know, but ABC doesnt really do that now so I doubt they did back then. If anything they announced a special guest star.