I don't think Alaska will ever be in the future of the Wonder or Magic. Both are warm weather ships. Ships that go to Alaska tend to have retractable roofs over the pools and top deck.
We did the 12-27-03 Eastern on the Magic, and in June of 2002 we were on HAL's Amstersdam to Alaska. They were having a heatwave in Alaska at the time, it was 72 in Juneau, but still pretty cool for unprotected pools.
Did great some great pictures of the kids and I in the only uncovered pool, aft, and heated with the Hubbard Glacier behind us, and chunks of ice floating by.