According to a new rumor the next Raptor will get two engine options, a supercharged V8 and high-output twin-turbo V6 with a hybrid system:
I don't know how much truth there is to that rumor, but its a good way to rival the TRX and still offer a Raptor spec that we're used to. Pricing is important to consider as well, the current Raptor is priced from $55,000 and the TRX from $71,690.
Next Ford F-150 Raptor Will Offer Two Engines: Report
The next Ford F-150 Raptor is said to get two engines, according to a report, with one of which being a limited edition.