Late-war Hellcat and Helldiver upgrades versus the next generation

Would improved Hellcats and Helldivers have served on US carriers if the Second World War lasted longer?

Probably, although the Navy might also move directly toward Bearcat and later Corsair variants rather than expand every interim upgrade.

The proposed F6F-6 Hellcat and SB2C-6 Helldiver were evolutionary powerplant and propeller upgrades rather than wholly new aircraft. A longer war could have put them into wider carrier service, especially if production preparations were already under way. Planners would also compare the value of those improvements with the Bearcat and later Corsair developments. Against the Zero, even a larger-engine Hellcat would add performance to an aircraft that already held a major combat advantage.