He'd still get blackmailed by Videl and train her, though Lime would come along to watch so that no funny business occurs. During the 25th TB, Gohan doesn't get as angry seeing Videl get tortured by Lord :bitch and only goes SSJ against Kibito, with events then proceeding as normally until Goku VS Vegeta. In this scenario, the energy given to Boo would be far less and it'd take longer for him to be revived, with Gohan and Dabura having a full rematch. Eventually, Gohan would by his own power or through rage find the power to kill Dabura and Shin would deal with Babidi, preventing Boo's revival. He'd then give Goku and Vegeta the chance to fight properly on the Kaioshinkai.
Five years later, Beerus shows up to Bulma's party. With no Boo, everything goes well, but Beerus returns days later demanding the Super Saiyan God. The Dragon Balls are used, Goku is revived and the ritual occurs with Pan having been born far sooner than in canon. After that, things progress more or less the same until the Moro Arc, where the lack of Boo means Goku and Vegeta are killed by Moro due to their fatigue and Moro continues to ravage the universe until Beerus finds out about him.