The terrain and the whole setup of that area is going to make an interchange there absurdly expensive, so RIP the city budget.
This is the study I cited that estimates $250M for both interchanges plus Sarcee widening to 6 lanes. The province is spending $600M and change to finish off the ring road and provide a backdoor for Sarcee, more or less bailing out the Sarcee/Bow intersection from utter failure.
There's some pretty serious cost-benefit discussions to be had when it comes to Sarcee/Bow... and none of it is good. Current plan is to quietly pretend like they don't know how much a gongshow it is and see what relief comes from the west leg.