There are some proposals/suggestions/wishes for AB 63 to be extended to Fort Chipewyan, but nothing anytime soon. I have an old presentation about Alberta's Future Highway needs (dated December 2001), which identifies proposed links to Fort Chipewyan via both AB 63 from the south and AB 58 from the west (from High Level), but they would be within a 50 year time frame if pursued. The
Northern [Alberta] Highways Strategy also identified an AB 63 extension to Fort Smith, NT, but nothing series is being discussed.
There is a winter road that connects the northern terminus of AB 63 with Fort Chipewyan (maintained by the Wood Buffalo RM) and the distances sign along AB 63 north lists both Fort Chipewyan and Fort Smith, so it might in the distant future. Fort Chipewyan is the largest community in Alberta that is inaccessible via an all-weather road, and a few years ago a mild winter (which closed the ice road early) lead to calls for an upgrade; future mild winters might expedite the need for an upgrade.
There was a plan to upgrade the winter road to La Loche, SK, and the Saskatchewan government build SK 956 (an all-weather gravel road) to the Alberta border in 2005, unfortunately Alberta didn't follow through in its upgrades. It seems that the province is more interested in extending AB 686 to form a western link to Fort McMurray, and with the 2016 Fort McMurray Wildfire there have been calls to construct alternative routes to AB 63 for exiting the city - both of which would bump down a link to Fort Chip and Fort Smith.