"I think it's exciting times at Cardiff Blues," he said.
I'd like my team, the Cardiff Blues, to play twice a week like the old days.
Cardiff Blues become only the sixth side in the competition's history to win all six of their pool matches.
Rush retired from playing at the end of the 2011-12 season and took up a coaching role with Cardiff Blues.
He will join the Cardiff Blues for the start of the Pro12 2012/13 season.
Johnson was linked with a move to the Cardiff Blues as skills coach, but decided not to accept this offer.
Cardiff Blues remain on course to qualify from a pool which if not exactly a pool of death has certainly been competitive.
Cardiff Blues won the trophy after a 28-21 win against Toulon.
Cardiff Blues were designated as the home team for the final.
After retirement, he remained with Cardiff Blues as a conditioning coach.