A modern S2000 is the only answer.
Before Honda decided to become a monotonous blob that only builds vehicles for unenthusiastic commuters, the Japanese automaker had a hand in the sports car segment with the S2000. It may not have been the fastest, the most enjoyable, or even the best sports car from the automaker, but the S2000 was a special sports car and deserves to come back to take the fight to the Mazda MX-5 Miata. As of right now, the Miata is running around like a teenager that has no concept between right and wrong, which is something Honda can fix.
The Miata is arguably one of the best sports cars on the market as of right now and only gets better with the roof down. No other cars in the $30,000 segment are as fun as Miata, which is why the convertible is doing so well. If Honda were to revive the S2000, even with all of the crazy hybrid all-wheel-drive rumors going around, it would give the Miata a run for its money. It may sound a farfetched idea, but Honda has all of the necessary parts to make a proper Miata killer and the S2000 moniker would give it a timeless name that enthusiasts are familiar with. While the NSX is a disappointment as a supercar, its twin-turbo V6 would be an amazing choice for a future S2000.
The 3.5-liter twin-turbo V6 makes 500 hp on its own, but a detuned version of the motor would only have to produce somewhere in the neighborhood of 300 hp to be competitive with the high-end sports cars and completely demolish the Miata. If that's too expensive for Honda to do, the automaker could borrow the engine out of the Civic Si—the 2.4-liter turbocharged four-cylinder engine. While the former engine is a lot more exciting, the 2.4-liter turbo four out of the Civic Si would make more power than the Miata and would keep costs down. Enthusiasts and Honda fan boys alike should all collectively yell at the automaker, because it has the goods to create one heck of a sports car. Just like it did 16 years ago.