Detroit's top brass might be brewing another serious BMW M5 competitor.Cadillac might be the last brand to come to mind when it comes to thinking of go-fast enthusiasts cars. But the top Detroit brass proved everyone wrong with its V-spec sedans.Especially the outgoing CT5-V Blackwing and the smaller CT4-V Blackwing. Both sedans met the enthusiasts' call for an optional six-speed manual and tons of power.AdvertisementAdvertisementNow, Caddy may be in the works with a major follow-up.Dumping millions on a new sedan and more gas-powered thingsCadillac recently discontinued the CT5-V Blackwing, but its saga is far from over. - Credit: CadillacGeneral Motors recently announced a major shift in its investment strategy to the tune of $275 million. One of the lyrics includes backing one of its largest manufacturing complexes in Spring Hill, Tennessee.But another notable point includes Cadillac, which GM confirmed it's allocating a massive chunk of this investment to build a new internal combustion-powered sedan. More specifically, around $150 million.Not only is this a significant undertaking by any means. It's also a major shock, at least in terms of Cadillac pivoting away from its electrification offensive.GM just pledged to invest a major lump of cash into a next-gen family of V8s. - Credit: CadillacSimilar to other luxury and innovative automakers, Cadillac and General Motors were both heavily investing into their EV strategy. But after the market spoke and EVs were clearly struggling to catch on, everyone pumped the brakes on their EV plans.AdvertisementAdvertisementThis latest move towards a new internal combustion-powered is sedan is Cadillac's recent strategy shift. Additionally, GM also changed direction and previously pledged to invest another major chunk of that investment into further developing its full family of V8 engines.Could this mean a new and serious performance sedan is in the works?GM and Cadillac shocked the enthusiast world when it answered the call for a midsize luxury performance sedan with an optional six-speed manual. - Credit: CadillacAs for what the new internal combustion-powered sedan is could be anyone's guess. But Internet speculation and rumors suggest it might be a follow-up to the company's hot CT5-V Blackwing.Or at least, it may be the platform behind the next-gen model, which would spawn a new CT5-V Blackwing successor, and potentially one for the CT4-V Blacking and company.Both sedans recently got the axe since both were nearing the end of the series production lifecycle. Without the CT4 and CT5, Cadillac is stuck selling only crossover SUVs and the Escalade, along with its electric vehicles.The CT5-V Blackwing proved America can seriously rival Germany's best in more ways than one. - Credit: CadillacRecently, however, Detroit's been looking into sedans once again, with many automakers getting a sense that sedans could be popular again and worth reviving.AdvertisementAdvertisementThere is a slight chance the new sedan could be a big flagship. Or basically, a successor to the old CT6. However, that model wasn't exactly a stellar seller and the full-size luxury market, or the one dominated by the likes of the Mercedes-Benz S-Class, BMW 7 Series and Audi A8, is one tough corner to crack.About the Author: Chris Chin is an associate editor at Gear Patrol, covering cars, trucks and anything else with four wheels. He has over a decade of experience writing news and reviews but considers himself an enthusiast first, with a passion for classics and European cars. His daily driver is a 1987 Mercedes-Benz 560SEL with nearly 250,000 miles (87,000 are his).Want to stay up to date on the latest product news and releases? Add Gear Patrol as a preferred source to ensure our independent journalism makes it to the top of your Google search results.