Dodge could be planning a Detroit surprise.

Dodge's Hellcat-powered 2015 Challenger SRT8 could makes its first appearance at next week's North American International Auto Show in Detroit.

The subject of spy photos for the last few months, fan site Allpar - citing inside sources - says the supercharged Dodge Challenger Hellcat could make its first public appearance next week in Detroit. Previous rumors suggested that the new Challenger and its Hellcat engine would debut sometime during 2014, but no specific date was given.

Set to rival top-spec muscle cars like the Chevrolet Camaro Z/28, the Hellcat's secret weapon will be a 6.2L supercharged V8 cranking out between 640 and 680 horsepower. Buyers will have the option of an eight-speed automatic or a six-speed manual transmission.

Pricing information has not been revealed, but the supercharged Challenger will reportedly carry a sticker price in the $70,000 to $80,000 range, putting it just about on par with the $75,000 Z/28.

Be sure to check back early next week for more details live from Detroit.