They should wait for next gen, because there are many GCN games that use the analog triggers, and the only Wii U controller that has that is the actual GCN controller, which only works for Smash. I don't think they'll use it for anything other than Smash if they haven't done so in 8 months. If the NX has analog triggers, then sure, then it'll happen next gen for sure.
bet: lost