With a TT V8 M5, there WILL NOT be a TT V8 M3. Not only due to emissions and weight, but COST. And if it was a TT V8, it definitely wouldn't be the S65, so stop dreaming
. It'd take significant changes, adding to the cost, when they already have 2 similarly sized TT V8s.
My money is on a TT V6 derived from the S63 TT V8, just like the S65 was derived from the S85. Yes, it'll be sacrilege, but so was an M truck
Finally, I personally think that article is pure BS. At this point, they're already testing that engine somewhere. Or close to.