Balesir
Adventurer
I don't think so, no.So, can certain upcoming games toting "modules" meet the One True System requirements? What if one RPG is more like a toolbox?
That's not to say that a system can't do a number of things - spreading accross genres is completely feasible, for example. The problem is that some styles require, or at least are hugely aided by, a completely different approach from the ground up. An example is the "rules or rulings" dichotomy. DDN, to pick a "modular" system at random

A system that aims to be a "toolbox" can only go so far. If the very fundamentals of the game need to be changed for one "configuration", then it's not really the same game. You need a chassis to attach the tools to, and if the chassis is wrong then the tools you attach don't matter that much.