They are kicking around an idea. Given the lack of infrastructure in the arctic is it worth it for the RCN to have a ship that could provide such infrastructure for CAF operations year round. It would probably look like an icebreaking hull with LHD capabilities. Which is where the rumours of the heavy RCN icebreaker is coming from. It wouldn't be an armed icebreaker, it would be an LHD that could icebreak for itself.
The Army needs to buy in or the gov't needs to identify a need. Its a reach even for the future capability cell IMHO. Hands will be full just doing the corvettes, subs, Rivers, and hopefully two more JSS.