Could continue with a standard playoff bracket to determine the winner of the combined tournament.
If you have two tournaments, A and B, with 8 participants each, you could combine them by having the top 4 teams from each tournament advance to a playoff stage. In this case, you could use a cross-bracket format to determine the matchups in the playoff stage. https://mapquestdrivingdirections.app
One possible way to determine the matchups would be to have the team that finishes 5th in Tournament A play against the team that finishes 3rd in Tournament B, and the team that finishes 6th in Tournament A play against the team that finishes 4th in Tournament B.
Once those matches are played, the winners would advance to face the top two teams from each tournament in the semifinals. From there, you could continue with a standard playoff bracket to determine the winner of the combined tournament.
Could continue with a standard playoff bracket to determine the winner of the combined tournament.