Image Credit: Toyota.Toyota's performance division could be preparing for one of its biggest sports car revivals in decades. A disguised prototype recently driven by Top Gear offers the clearest indication yet that multiple new performance models may be on the horizon.At first glance, the test vehicle looks like a heavily modified GR Yaris. A closer inspection reveals something far more interesting. The engine sits behind the driver instead of under the hood, transforming the hatchback into a mid-engined development mule.Toyota has not officially confirmed exactly what the prototype is testing. However, the company says its new turbocharged engine has been designed for both front- and mid-engine applications, fueling speculation that successors to the Celica and MR2 are both under development.AdvertisementAdvertisementIf that's the case, Toyota could soon offer one of the broadest sports car lineups in the industry.A Prototype Hiding Something BiggerImage Credit: Toyota.Although it wears familiar GR Yaris bodywork, the prototype is built on a completely different platform. The wheelbase is longer, the proportions are altered, and the driving experience reportedly bears little resemblance to the standard hot hatch.According to Top Gear, some prototypes use the existing turbocharged 1.6-liter three-cylinder engine mounted behind the seats. Others feature Toyota's new G20E turbocharged 2.0-liter four-cylinder, an engine currently being developed for future high-performance applications.Toyota says the G20E was designed with flexibility in mind. It can be installed in either a front- or mid-engine layout, paired with rear- or all-wheel drive, and even adapted for hybrid powertrains. That versatility strongly suggests the engine is intended for more than a single model.A Future MR2?The mid-engine layout naturally points enthusiasts toward the MR2 name. Toyota has remained tight-lipped about its future sports car plans, but using a mid-engined prototype allows engineers to develop chassis balance, suspension tuning, and powertrain packaging before revealing a production model.AdvertisementAdvertisementTop Gear reported that the prototype behaves much like a traditional mid-engined sports car. The steering is light and responsive, while the rear rotates eagerly when the driver lifts off the throttle, characteristics often associated with cars like the Porsche Cayman.Even lower-powered development versions were described as highly engaging to drive.The Celica Also Appears To Be BackA new Celica has already been publicly acknowledged by Toyota executives, and the flexible G20E engine could provide the perfect foundation.Because the engine supports both front- and mid-engine installations, Toyota could potentially use the same basic powertrain across multiple sports cars while giving each a distinct personality.AdvertisementAdvertisementA front-engined Celica could serve as an affordable everyday sports coupe, while a mid-engined MR2 would deliver a more focused driving experience. Sharing engine architecture across several models would also help reduce development costs.Up To 400 Horsepower Is Already Being TestedToyota demonstrated a more advanced version of the prototype powered by the new 2.0-liter turbocharged engine producing around 400 horsepower in development form.According to Top Gear, the prototype combines strong acceleration with quick throttle response and an eager, high-revving character. Engineers also designed the engine to accommodate future hybrid technology, giving Toyota flexibility as emissions regulations continue to tighten.The company has not confirmed production specifications, but the engine appears capable of supporting everything from affordable sports cars to more serious performance models.Toyota's Sports Car Revival ContinuesThe GR86, GR Corolla, and GR Supra have already helped restore Toyota's reputation among driving enthusiasts. This latest prototype suggests the company has no intention of slowing down.AdvertisementAdvertisementWhile Toyota has yet to officially unveil a next-generation MR2 or Celica, the engineering behind this unusual test mule points toward a broader strategy. Rather than developing a single halo car, Toyota appears to be creating a versatile performance platform capable of underpinning multiple future models.For enthusiasts, that may be the most exciting development of all. After years of shrinking sports car lineups across the industry, Toyota seems determined to prove there is still room for lightweight, engaging performance cars in the modern era.If you want more stories like this, follow Guessing Headlights on Yahoo so you don't miss what's coming next.