Cardiff can do Newport a good turn by defeating Llanelli at the Arms Park on Friday and leaving Newport with a title chance if they in turn beat Bridgend on Saturday.
If Cardiff win and Newport lose, it would be Cardiff's title, but if Llanelli win on Friday, they will be the champions.
The three clubs, plus current leaders Neath, have already secured places in next season's Heineken Cup, with the fifth place going to Swansea or Pontypridd - the latter gaining the place if they defeat Sale Sharks and win the Parker Pen Shield on May 26 at Oxford.
The current Welsh/Scottish League table for the top seven clubs is: -
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.