The expansion draft rules let teams pick which poison pill they want to take. One option lets a team protect effectively protect their first and second lines of forwards and expose a one of their second pairing defensemen. The other option lets a team protect the first and second pairing of defensemen, but means a second line forward should be exposed.
For Seattle, the system is meant to allow them to build a team with 4 lines of middle six, 3 pairings of defensemen with second pairing minutes, experienced goaltending, and NHL talent for depth.
For Poile, the aforementioned poison pill decision would effectively boil down to losing 1 of Duchene, Jarnkrok, or Kunin vs. losing 1 of Ekholm or Fabbro. From the Kraken's perspective, any one of those options could be very attractive depending on their overall plan. Duchene or Ekholm would be attractive options that could be moved into first line roles but would cost, but then the Kraken have to spend cap on somebody regardless. Kunin and Fabbro would be attractive price controlled but younger and less proven options to develop for the longer term. Jarnkrok would be a great puzzle piece in terms of performance-to-cost and be a utility player who could slot in anywhere in the lineup for a year.
The one thing this rollercoaster season is showing though is that the Predators development pipeline may not have been as completely barren and empty as it was being sold as. Add that the NHL is to some extent a game of free agent musical chairs, and there will be options available for the Preds. They may not be great options, they may not work out, or they may cost more. But the jig isn't up no matter who Seattle takes.