The top tier cup would involve the 12 Guinness Premiership clubs, the four Welsh Regions and four clubs from a revamped second tier of English rugby.
The second cup would feature the remaining eight clubs from the English second tier and six teams from the Welsh Premiership.
WRU Group Chief Executive Roger Lewis plans to outline progress over talks so far with the Welsh Premier Division representatives in the coming weeks. He has also asked Cardiff Blues Chief Executive Bob Norster to join him for the next phase of discussion with the RFU over the main proposals.
Roger Lewis described ideas as exciting moves which would ensure top class anglo-Welsh matches complement Magners League matches in seasons ahead. He said the discussions aimed at finalising cup competition details signify a strong desire to preserve the historically important anglo-Welsh rivalry.
He said, "I've been in discusssions with the RFU aimed at growing the game, not just at Regional level but at Premiership level too for a number of months.
"There are clear implications for the Premiershipand I will be holding discussions with those clubs in a couple of of weeks' time.
"These proposals will create exciting competition which the game needs and will also bring additional money to replace the EDF Energy Cup. There is a shared desire among the RFU and WRU to preserve anglo-Welsh encounters to enhane existing competitions. But anglo-Welsh matches must complement Celtic rugby and we are also determined to develop the Magners League."