The scenario is not that simple, the title will not go to Inter directly if Milan fail to win against Verona. A draw means that the points will be the same, a lose of Milan means that Inter will lead by 1 point only. With the fact that there will be 2 other matches, any possibility may still happen. I think we will need to wait till the last round of the season to see who take the title unless Milan lose 2 matches in a row against Verona and Atalanta while Inter win against Cagliari in the next round.
With a difference of one point between Inter and AC Milan, then Inter still has 2 games left to play. Meanwhile, AC Milan still has 3 matches that
have not been played, so there are still many possible scenarios. Because both teams still have the same chances, so as you said maybe after
all rounds in Serie A have been played, it will be known in the end Inter or AC Milan who will win the Serie A trophy. Especially AC Milan,
which is now 1 point behind Inter, AC Milan must be able to beat Verona who is their next opponent. Since there is no time for AC Milan to make
mistakes, AC Milan should be able to win the remaining 3 games if they are serious about winning the Serie A trophy this season.