I highly doubt it's a brand new engine... or even a heavily revised one. I agree it's likely just intake/exhaust tweaking. The plumbing on the Explorer is different from the TTSE, so not sure if any of that will be transferable. I hope I'm wrong though and Triumph does make some substantial gains - maybe with VVT, or good old cc's? Now that the R1200 wasserboxer is on parity powerwise with the 1215cc triple, Triumph could use a power boost.
In any case, I don't think more power alone is enough for me to upgrade, but if they package it with a host of refinements, I could be tempted. Still, the TTSE as is doesn't have a whole lot leaving me wanting. Maybe better instrumentation and controls. A restyled front end with three headlights would be fantastic. C'mon Triumph, it's a... Triple, remember? Just because BMW stole that design cue doesn't mean you should give it up.