If Trail is the Gumshoe derivative, then I'll stick with Call (which in my book is simply nonpareil, but of course everyone has an opinion).
When D&Ders beat their glaive-guisarmes into ploughshares, we'll know it's time for something new, shiny and thoroughly incompatible with the last $1000 worth of game products you bought.
Then shall nostalgia driven
4E devotees take up the wailing and gnashing of teeth incumbent upon curmudgeons. Then shall 5E evangelists don the nerd mantle of insisting that every friend of theirs must like their new best friend just as much.
The Circle of Life goes ever on.