If they do get to the final, they could face Leicester, which would be the equivalent of Liverpool vs Man United in the Champions League
I'm sure teh mite wouldn't want to hear it but Saints have a wiff of the Everton/City about them. Fine tradition, great fanbase but a bit of a rollercoaster ride.
Leicester will be the Man United of rugby, Wasps strike me as the liverpool (great cup side, not the best in the league). Mercirial Sale could be Arsenal with it's French element.