I have serious doubts over this. It's one thing to create a great hot hatch (like Renault), it's another to create something that is just great at the Ring. Honda haven't done anything of note in terms of suspension or engine design in almost 10 years now, so they'd have to do something spectacular to make a car better than the current Megane RS.
Even if it is quicker round the Ring, that may not necessarily make it a great car. The 918 has done a 6'57", which by all accounts is significantly quicker than the more powerful and lighter P1, but you just know that on a regular circuit the P1 will monster the 918. Not exactly apples with apples, I know, but being good at the Ring doesn't mean a massive amount other than bragging rights.